OBD-II Code U1267: Lost Communication With Shifter

What Does U1267 Mean?

U1267 is a network communication code. It means your vehicle's main computer has stopped receiving a valid signal from the Electronic Shift Module (ESM) — the knob, dial, or lever used to select Park, Reverse, and Drive. This communication breakdown prevents your vehicle from knowing its current gear, leading to a no-start condition or a transmission stuck in Park.

Technical definition: The formal definition for this manufacturer-specific code on Chrysler, Dodge, Jeep, and Ram vehicles is "No Valid Data Available from Electronic Shift Module (ESM) on the CAN-C or CAN D-PT Bus". The ESM has stopped broadcasting its status over the vehicle's internal network, blinding critical modules like the Transmission Control Module (TCM) to its commands.

Can I Drive With U1267?

Yes, But With Caution. You can drive, but you risk being stranded. If the Electronic Shift Module (ESM) fails at startup, the vehicle will not start or shift out of Park. If it fails while driving, the transmission locks in the current gear. The primary risk is immobilization requiring a $100-$250 tow. Diagnose the vehicle immediately.

Common Causes

• Weak or Failing Battery (Main or Auxiliary) (Very Common) — Low voltage is the primary cause of U1267. When voltage drops below 12.4V, modules fail to initialize during startup. On vehicles with Engine Start-Stop (ESS), a failing auxiliary battery causes the exact same communication blackout even if the main battery is healthy.
🎬 See how to replace the main and auxiliary batteries here.
• Electronic Shift Module (ESM) Software Glitch (Common) — Software bugs in the shifter module frequently drop network communication. Manufacturers like Ram have issued Technical Service Bulletins (TSBs) to update ESM software, resolving no-shift conditions and U1267 codes.
• Corroded Battery Terminals or Cables (Common) — Corrosion or loose connections at the battery posts interrupt power supply, creating the same voltage drop as a dead battery. Internal breaks in the battery harness also cause intermittent power loss to network modules.
• Poor Pin Retention in Star Connector (Less Common) — On Chrysler Pacificas, CAN bus wires meet at a junction block called a 'star connector' under the glove box. Female pin connectors lose tension over time, causing intermittent communication loss and triggering a flood of 'U' codes.
• Aftermarket Equipment Interference (Less Common) — Improperly installed accessories (cameras, lighting, radios) disrupt the CAN bus network. Tapping into dash or shifter wiring blocks ESM signals, triggering the code.
• Faulty Electronic Shift Module (ESM) (Less Common) — The internal electronics of the rotary dial shifter assembly fail permanently, requiring complete replacement of the unit.
• Damaged Wiring or Connectors (Less Common) — A damaged wire or contaminated connector between the ESM and the network blocks the signal. This typically happens behind the dashboard or at network junction points.

Symptoms

• Check Engine Light is On — An illuminated Malfunction Indicator Lamp (MIL) on your dashboard.
• Stuck in Park — You cannot move the shifter knob or lever out of the Park position, leaving the vehicle immobilized.
• Engine Won't Start or Hesitates — The vehicle refuses to crank or struggles to start because it cannot confirm it is in Park or Neutral.
• 'Service Shifter' Message on Dash — The instrument cluster displays a 'Service Shifter' warning, directly indicating a fault in the shifter system.
• Instrument Cluster Stays On — After turning the vehicle off, the dashboard cluster remains lit or flashes, draining the battery.
• Backup Camera Inoperable — The backup camera stops working because it shares the same data network or power supply as the ESM.

Diagnostic Flowchart

Tap your situation to follow the diagnostic path that matches what you're seeing on this code.

Common Fixes & Costs

• Main Battery Replacement — Parts: $200-$350, Labor: $50-$100, ~0.5 hr book time (DIY)
• ESM Software Update at Dealership — Parts: $0, Labor: $150-$250, ~1 hr book time (Professional)
• Auxiliary Battery Replacement — Parts: $100-$180, Labor: $75-$150, ~1 hr book time (DIY)
• Electronic Shift Module (ESM) Replacement — Parts: $150-$400, Labor: $150-$250, ~1 hr book time (Intermediate)
• CAN Bus Star Connector Repair — Parts: $90-$120, Labor: $200-$400, ~2 hr book time (Professional)

Used vs. New Parts: Buying Guide

When a used part is worth it: A used Electronic Shift Module (ESM) makes sense for older, high-mileage vehicles where the cost of a new OEM part is prohibitive. Source the part from a reputable seller with a short-term warranty.

Donor-vehicle mileage cap: roughly under 100000 miles for the part to have meaningful remaining life.

Donor quality checklist:

• Verify the part number and button configuration match your original part exactly.
• Buy from a seller offering at least a 30-90 day warranty.
• Avoid parts from flood or heavily wrecked vehicles.

Decision logic:

• If The fix is a known software TSB → Do not buy any part; pay the dealer for the software update.
• If Vehicle is under 100K miles and retains significant value → Purchase a new OEM part for maximum reliability and warranty.
• If Budget is the primary concern → A used part from a reputable recycler is an acceptable choice.

Warranty tradeoff: Used parts typically come with a 30-90 day functional warranty. New OEM parts installed by a dealer carry a 1-2 year parts and labor warranty.

Worst-case if a used part fails: $300-$500 if a used part fails shortly after installation, requiring repeat labor costs and another replacement part.

What Happens If You Wait — Timeline

1. 0-1 month: An intermittent Check Engine Light appears, often after a cold start. The code clears on its own with no drivability symptoms. (MPG impact: 0%% · Added cost: $0)
2. 1-3 months: The Check Engine Light and 'Service Shifter' message stay on consistently. The vehicle occasionally hesitates to start, indicating a weakening battery. (MPG impact: 0%% · Added cost: $0-$50)
3. 3-6 months: The vehicle intermittently fails to start or shift out of Park. The issue requires a jump start or waiting for the module to reset. (MPG impact: 0%% · Added cost: $100-$250)
4. 6+ months: A hard failure occurs. The vehicle will not start or shift out of Park under any circumstances, resulting in total immobilization. (MPG impact: N/A% · Added cost: $350-$600)

Cost of Not Fixing It

• Immediate: Intermittent no-start or 'Service Shifter' warnings. High risk of being unable to shift out of Park. (Added cost: $100-$250)
• 1-3 months: Increased frequency of failure. The vehicle gets stuck in gear while driving or fails to start, requiring a tow. (Added cost: $100-$250 per incident)
• 3+ months: A persistent fault leads to a hard failure, making the vehicle undrivable until repaired. (Added cost: $350+)

Diagnosis Steps

1. Check the Battery and Terminals
   Verify your battery's health using a multimeter. A fully charged battery reads at least 12.6 volts with the engine off. A reading below 12.4V requires charging, and below 12.0V indicates a failing battery. Clean any white or blue-green corrosion on the battery posts and tighten the clamps.
   Tools: Multimeter, wrench set, wire brush (Beginner)
2. Check Auxiliary Battery (If Equipped)
   If your vehicle has an Engine Start-Stop (ESS) system, test the smaller auxiliary battery. A failing auxiliary battery causes electrical gremlins and communication codes. It must read above 12.6 volts when healthy.
   Tools: Multimeter, wrench set (Intermediate)
3. Perform a Hard Reset
   Disconnect both the positive and negative battery cables and touch the cable ends together for 30 seconds. This drains residual power from all modules and clears temporary communication glitches caused by low voltage. Reconnect the battery (positive cable first).
   Tools: Wrench set (Beginner)
4. Check for Technical Service Bulletins (TSBs)
   Search online for TSBs related to your VIN and the U1267 code. For example, TSB 08-084-23 exists for 2022 Ram trucks and involves a software update a dealer must perform.
   Tools: Internet access, VIN (Beginner)
5. Inspect Shifter and Dash Wiring
   Remove dash trim to visually inspect the wiring harness and connector going into the back of the electronic shifter. Look for pinched or frayed wires and ensure the connector is securely plugged in, especially if aftermarket accessories were recently installed.
   Tools: Trim removal tools, flashlight (Intermediate)
6. Pro Tip: Monitor Live Data
   Using an OBD-II scanner, monitor the live data PID for 'Control Module Voltage'. This value must remain steady and above 13.0 volts when the engine is running. Drops below 12.5 volts indicate a charging system problem.
   Tools: Professional OBD-II Scan Tool (Advanced)
7. Pro Tip: Inspect Star Connectors / Junction Blocks
   For persistent communication issues on Chrysler Pacificas, locate the CAN bus star connectors behind the glove box. Disconnect the battery, unplug the connectors, and inspect for loose-fitting pins. Poor pin tension causes intermittent network failure.
   Tools: Trim removal tools, flashlight, pin tension gauge (optional) (Advanced)
8. Pro Tip: Test CAN Bus Resistance
   With the battery disconnected, measure the resistance between Pin 6 (CAN High) and Pin 14 (CAN Low) at the OBD-II port. A healthy network reads 60 ohms. A reading of 120 ohms indicates an open circuit; 0 ohms indicates a short.
   Tools: Multimeter, OBD-II port pinout diagram (Advanced)
9. Pro Tip: Check CAN Bus Voltages
   With the key on and engine off, check DC voltage at the OBD-II port. Pin 6 (CAN High) should read 2.6-3.5 volts, and Pin 14 (CAN Low) should read 1.5-2.4 volts. Voltages outside this range point to a wiring short or a faulty module.
   Tools: Multimeter, OBD-II port pinout diagram (Advanced)

When This Code Triggers (Freeze-Frame Conditions)

• Module Voltage: 9.5-11.5V (During engine crank)
• RPM: 0 (Key On, Engine Off)
• Vehicle Speed: 0 mph (Key On, Engine Off)
• Gear Selector Position: Unavailable/Fault (At time of fault)

Related Codes

• U0103 — 'Lost Communication with Electric Gear Shift Module.' U1267 is the specific 'what' (no valid data), while U0103 is the general 'who' (the ESM is offline). They appear together for the same fault.
• U11E3 — 'TCM Lost communication with ESM on D-PT CAN.' This confirms the Transmission Control Module (TCM) cannot hear from the shifter.
• P0562 — 'System Voltage Low.' This code strongly suggests the root cause of the communication failure is a weak battery, not a faulty shifter.
• B22A9 — 'ECU Internal Performance.' Indicates the Body Control Module (BCM) is experiencing issues due to the same underlying low voltage or network problem.

Climate & Environmental Factors

• Cold Weather: Low temperatures reduce a battery's chemical efficiency. A weak battery provides enough power to crank the engine but fails to keep electronic modules online during the voltage sag, triggering U1267.
• High Humidity: Humid environments accelerate corrosion on battery terminals, ground points, and star connectors. This corrosion increases resistance and causes intermittent communication failures.

How to Talk to a Mechanic About This Code

Say this: "I have a U1267 code and my symptoms are [intermittent no-start / 'Service Shifter' message]. I'd like to book a diagnostic appointment. Please start by load testing the battery and checking for any shifter-related TSBs or software updates before diagnosing modules or wiring."

This directs the technician to the most common and cheapest fixes first (battery and software), preventing them from immediately quoting an expensive shifter replacement.

Avoid saying:

• 'My check engine light is on, can you look at it?'
• 'The code is U1267, just replace the shifter.'
• 'Just fix whatever's wrong.'

Questions to ask before authorizing the repair:

• What was the result of the battery load test for both the main and auxiliary batteries?
• Did you check my VIN for any open TSBs or software updates for the Electronic Shift Module?
• If you recommend a module replacement, what specific tests ruled out a wiring or connector issue?
• What is the warranty on this repair for both parts and labor?

Where to Take It: Dealer vs Independent vs Chain

• Dealer:
  Best for: Vehicles under warranty, Performing software updates (TSBs), Complex network diagnostics involving proprietary tools (wiTECH)
  Downsides: Highest labor rates, May replace modules rather than diagnose intermittent wiring (Typical cost: +50% vs. baseline)
• Independent Shop: A good choice if the problem is a simple battery issue. For newer Stellantis vehicles, a trip to the dealer is unavoidable for software flashes.
  Best for: Out-of-warranty vehicles, Diagnosing and replacing batteries, Tracing common wiring faults
  Downsides: Cannot perform manufacturer software updates, May lack experience with specific issues like the Pacifica 'star connector' (Typical cost: +0% vs. baseline)
• Chain Shop: Acceptable ONLY for a battery test and replacement. AVOID for any further diagnosis of a U1267 code.
  Best for: Free or low-cost battery testing and replacement
  Downsides: Technicians lack the training to diagnose network communication faults., High pressure to sell unnecessary parts. (Typical cost: -10% vs. baseline)

When to Walk Away From the Repair

If the estimated repair cost exceeds 40-50% of the car's private-party value, seriously consider selling or trading in the vehicle as-is.

• Car worth $18000, fix is $800: Fix it. The repair cost is well below the threshold.
• Car worth $8000, fix is $1200: Borderline. This repair is significant relative to the car's value. Get a second opinion before proceeding.
• Car worth $4000, fix is $1500: Walk away. The repair cost is over a third of the vehicle's value.

What Scan Tool You Need for This Code

Minimum: A scanner that reads manufacturer-specific codes (including 'U' codes) for your vehicle's brand.

A basic $20 code reader shows 'No DTC definition found' for U1267. You need a tool that identifies the Electronic Shift Module and sees other modules on the network.

Budget: Autel AP200 / BlueDriver Pro (~$60) — These bluetooth dongles connect to your smartphone and read manufacturer-specific 'U' codes. They display live data, like module voltage, which is critical for diagnosing this code.

Mid-range: Foxwell NT510 Elite / iCarsoft CR PRO (~$180) — These handheld scanners offer broader vehicle coverage and provide a stable connection. They are dedicated tools for DIYers who work on multiple cars.

Professional: Autel MaxiCOM MK808S (~$450) — This full-featured diagnostic tablet offers bidirectional control. You can command modules to perform actions, confirming if a module is offline or if there's a wiring break.

Rent vs buy: For a one-time diagnosis, auto parts stores offer loaner tools capable of reading 'U' codes. If you perform regular maintenance, buying a budget or midrange scanner is a worthwhile investment.

How to Clear the Code After You Fix It

1. Fix the underlying cause (e.g., replace battery, update software).
2. Use an OBD-II scan tool to formally clear the Diagnostic Trouble Code.
3. Perform a full drive cycle to allow vehicle readiness monitors to run.

Drive cycle (~30 minutes): From a cold start, let the vehicle idle for 2-3 minutes. Drive in mixed city/highway conditions, including steady-state cruises and stop-and-go situations. This allows the computer to run its self-tests.

Readiness monitors affected: Comprehensive Component Monitor, Misfire Monitor

Before emissions retest: drive at least 100 miles to fully set monitors.

Watch out for:

• Disconnecting the battery clears the code but resets all readiness monitors to 'Not Ready', causing an immediate emissions test failure.
• The code returns immediately if the root cause, such as a weak battery or software bug, is not fixed.

Will This Fail Emissions / State Inspection?

Yes — this code typically fails an OBD-II emissions inspection.

• California: An illuminated Check Engine Light from a 'U' code is an automatic failure. You must complete a drive cycle to set readiness monitors after repair.
• New York: An active U1267 code causes an automatic failure. For 2001+ vehicles, only one readiness monitor can be 'Not Ready' to pass.
• Texas: In counties requiring emissions testing, an illuminated Check Engine Light is an automatic fail. Drive 50-100 miles to reset readiness monitors before re-inspection.

Most Commonly Affected Vehicles

• Ram 1500 (2019-2024) — Extremely common issue triggered by a weak battery. TSB 08-084-23 fixes a software glitch in the rotary shifter for 2022 models.
• Chrysler Pacifica (2017-2024) — Highly susceptible to this code. A known failure point is the CAN bus 'star connector' behind the glove box, which develops poor pin retention.
• Ram 2500/3500 (2019-2024) — Heavy-duty models use the electronic shifter and are prone to this code due to low voltage from a failing battery.
• Dodge Durango (2018-2024) — Equipped with an electronic shifter that experiences communication issues linked to battery health.
• Jeep Grand Cherokee (2018-2024) — Shares electronic architecture with Stellantis vehicles and logs this code as a secondary fault when battery voltage is low.
• Jeep Gladiator / Wrangler (JL) (2018-2024) — Logs a 'Service Shifter' message and U1267 code if the auxiliary battery for the start-stop system fails.
• Chevrolet / GMC Silverado / Sierra (2019-2024) — GM trucks with electronic shifters log U1267 for a faulty shift lever assembly or internal wiring harness.
• Alfa Romeo Giulia, Stelvio (2017-2024) — Logs code U1267 for an ESM communication fault triggered by momentary low battery voltage during startup.

Manufacturer-Specific Notes

• Ram/Dodge/Chrysler/Jeep: On 2017+ vehicles, this code points to the Electronic Shift Module (ESM) or its power supply. A weak main or auxiliary battery is the number one trigger.
• Chrysler: On the Pacifica minivan, a misdiagnosed cause for U1267 is poor pin retention in the CAN bus star connector behind the glove compartment. Wiggling the wires makes the problem appear or disappear.
• Dodge: On older Dodge models, U1267 indicates Parking Assistance Camera (PAC) voltage is too low, caused by a bad camera or wiring.
• Jeep: On older Jeep models, U1267 is defined as 'HO2S-11 Circuit High Input,' an oxygen sensor fault completely unrelated to the shifter.

Real Owner Stories

2020 Ram 1500 with intermittent no-start

Truck intermittently failed to crank, requiring a jump start. After the jump, the check engine light illuminated with code U1267.

What they tried:

1. Cleared the code by disconnecting the battery.
2. Cleaned minor corrosion from battery terminals.
3. Took it to the dealership, who initially diagnosed a communication error.

Outcome: The root cause was a weak battery. Replacing the main battery eliminated all codes and sluggish starting symptoms.

Lesson: A weak battery lacks the stable voltage required by electronic modules during startup, triggering communication codes. Always load test the battery before assuming a complex module fault.

2017 Chrysler Pacifica with 'Service Shifter' message

Van started but refused to shift out of Park, displaying a 'Service Shifter' message. The issue was intermittent and required multiple tows.

What they tried:

1. Shop replaced the main battery.
2. Shop replaced the electronic shifter assembly.
3. Shop replaced the Powertrain Control Module (PCM).

Outcome: None of the expensive repairs worked. The problem was traced to a failing CAN Bus 'star connector' behind the glove box. Slamming the glove box shut temporarily resolved the error, confirming the loose connection. Replacing the $90 part fixed the van.

Lesson: On Chrysler Pacificas, a flood of communication codes not solved by a new battery is likely a faulty star connector. Do not replace expensive modules like the shifter and PCM without checking this junction block.

2019 Ram 1500 with U1267 after DIY work

The owner removed the radio and center dash trim to run wires for a new camera. After reassembly, code U1267 appeared, and the instrument cluster stayed lit after turning the truck off.

What they tried:

1. Disassembled the dash to check for pinched wires.
2. Checked fuses and relays.

Outcome: The issue was caused by an A/C harness connector that was not fully seated during reassembly. Re-seating all harnesses cleared the code permanently.

Lesson: If code U1267 appears immediately after performing work inside the dashboard, a disturbed connector is the cause. Meticulously re-trace your steps and ensure every harness plug is fully connected.

How to Prevent This Code From Triggering

• Test Vehicle Battery Regularly (Every 6 months or at every oil change) — A weak battery is the #1 cause of U1267. Catching a weak battery before it fails prevents communication codes and no-start situations.
• Keep Battery Terminals Clean (Annually) — Corrosion on battery posts increases resistance and causes voltage drops that trigger module communication errors.
• Avoid Short Trips and Extended Idling (Daily habit) — Frequent short trips prevent the alternator from fully recharging the battery, making the system susceptible to voltage drops during engine start.
• Ensure Professional Installation of Aftermarket Electronics (As needed) — Improperly tapping into vehicle wiring disrupts the CAN bus network. Professional installation prevents interference with critical modules like the ESM.
• Keep Vehicle Software Updated (Check for TSBs annually) — Manufacturers release software updates to fix communication bugs that cause codes like U1267.

Frequently Asked Questions

Can a bad battery really cause a shifter code?

Yes, absolutely. It is the most common cause. Modern vehicles are extremely sensitive to voltage, and a weak battery causes random communication errors between modules before you even notice slow engine cranking.

I replaced my battery and the code is still there. What's next?

First, perform a hard reset by touching the disconnected battery cables together to clear module memory. If it returns, check for any available software updates (TSBs) from the dealership. If no update exists, inspect wiring at known weak points like the shifter connector and CAN bus star connectors.

My backup camera also stopped working. Is the camera the problem?

Probably not. The backup camera and the shifter lose communication due to a shared root cause, which is almost always a weak battery or a bad connection. The camera going out is a symptom, not the cause.

What are the most common misdiagnosis mistakes for a U1267?

The biggest mistake is replacing the expensive Electronic Shift Module (ESM) without first thoroughly testing the battery and checking for software updates. Another common pitfall is chasing secondary symptoms, like a dead backup camera, instead of addressing the primary power supply. Always start with the simplest and most common cause: the battery.

Is it safe to just clear the code and keep driving?

You can clear it, but if the code returns, you risk a no-start condition or being stuck in gear. It is not safe to ignore a recurring U1267 code. The shifter will eventually stop responding entirely, leaving you stranded.

Why does my scanner say 'No DTC definition found' for U1267?

U1267 is a manufacturer-specific code, not a universal OBD-II standard. Cheaper, generic code readers lack the definitions for these proprietary codes in their database. You need a professional-grade scanner or a brand-specific tool for accurate diagnosis.

The dealer wants to charge me $200 just to diagnose the light. Is that normal?

Yes, a diagnostic fee of $150-$250 is standard at most dealerships and independent shops. This covers the technician's time and the use of advanced diagnostic tools. They perform active tests to find the root cause rather than just reading the code.

What is the 'star connector' and why does it cause U1267?

The star connector is a central junction block where multiple CAN bus network wires connect, allowing modules to communicate. On vehicles like the Chrysler Pacifica, the pins inside this connector become loose over time. This causes intermittent communication loss, triggering code U1267 and other 'U' codes.

Can I fix U1267 myself?

If the problem is a weak battery, loose terminals, or a blown fuse, a DIY fix is straightforward. However, if the cause is a software issue, internal module failure, or a complex wiring problem, stop DIY efforts. Take the vehicle to a professional with advanced diagnostic tools.

Key Takeaways

• Code U1267 indicates the Electronic Shift Module (ESM) has stopped broadcasting data on the CAN bus network, locking the transmission in Park.
• Test your main and auxiliary batteries first; voltage drops below 12.4V are the root cause of this code in over 60% of cases.
• Do not replace the $300+ shifter assembly without checking for manufacturer software updates, such as Ram TSB 08-084-23.
• On Chrysler Pacificas, a recurring U1267 code paired with a 'Service Shifter' message usually requires replacing the $90 CAN bus star connector behind the glove box.
• Clear the code by performing a hard battery reset (touching disconnected cables together for 30 seconds), but expect it to return if the underlying voltage or software issue remains.