P1614 on 2013-2022 Chevrolet Trax: Immobilizer and No-Start Causes

What's Unique About the 2013-2022 Chevrolet Trax

For many GM vehicles, including the Trax and its platform mates, the immobilizer function is integrated with various control modules, including the Body Control Module (BCM) and a Rear Integration Module (RIM). A communication breakdown with any of these can trigger a P1614 code. Unlike some other makes where P1614 is strictly a key-to-antenna issue, on a Trax it points specifically to a broader vehicle network communication problem that manifests as a security fault, disabling the engine.

Symptoms You May Notice

• Engine cranks but does not start.
• Engine starts for a few seconds and then immediately stalls.
• The security indicator light on the dashboard may be flashing or steadily illuminated.
• Check Engine Light is on.
• No response from the starter motor (no crank).
• Multiple other warning lights (like ABS, Traction Control) may appear simultaneously if the BCM is failing.

Most Likely Causes

1. Defective Ignition Key or Weak Key Battery 🔴 High Probability Key fobs can be damaged by being dropped, and internal batteries wear out over time, weakening the transponder signal. The internal transponder chip can also fail or lose its programming.
   How to confirm: Try starting the vehicle with a spare key. If the spare key works, the original key is faulty. Replacing the battery in the key fob is a simple first step if the signal is weak.
   Typical fix: Replace the battery in the key fob. 🎬 Watch how to replace your Chevy key fob battery If that fails, the key itself may need to be replaced and programmed to the vehicle by a dealer or automotive locksmith with appropriate tools.
   Est. part cost: $5-$15 for a battery, $150-$350 for a new key and programming.
2. Faulty Immobilizer Antenna (Transponder Reader) 🟡 Medium Probability The antenna is a ring located around the ignition cylinder. It can fail due to age or internal electrical faults, preventing it from reading the key's transponder chip.
   How to confirm: A professional scan tool can monitor the data from the immobilizer module to see if it is receiving a signal from the key. The wiring to the antenna should also be inspected for damage. A technician can test the continuity of the antenna ring.
   Typical fix: Replacement of the immobilizer antenna ring. This part often requires removal of the steering column covers to access. The new part may require programming.
   Est. part cost: $50-$150
3. Body Control Module (BCM) or Wiring Issue ⚪ Low Probability The BCM is the central hub for the security system. Wiring issues (corrosion, breaks, bad grounds) or an internal BCM fault can disrupt communication with the key, RIM, and ECM. Water intrusion in the cabin can also damage the BCM.
   How to confirm: A technician will need to test the power, ground, and data lines at the BCM connector. A full diagnostic scan will check for other communication codes (U-codes) that would indicate a network problem. Checking for parasitic battery drain can also point to a faulty BCM.
   Typical fix: Repairing the damaged wiring or replacing the BCM. A replacement BCM must be programmed to the vehicle's VIN and security system.
   Est. part cost: $50-$200 for wiring repair, $400-$800 for a programmed BCM.

Rare But Worth Checking

• Low Vehicle Battery Voltage: A weak or dying car battery can cause various electronic modules to malfunction, lose communication, and set codes like P1614. Before diving into complex diagnostics, ensure the vehicle's main battery is fully charged and healthy.
• Faulty Engine Control Module (ECM): In very rare cases, the ECM itself may be the source of the communication error, failing to correctly process the security handshake from the BCM. 🎬 See how to fix a flashing GM security light issue This is usually the last item to be considered after all other possibilities are ruled out.
• Faulty Rear Integration Module (RIM): Since the code specifically points to a loss of serial data from the RIM, a failure of the RIM module itself, its power, or its ground connection is a possible, though less common, cause.

Diagnosis Steps

1. Verify the code with an OBD-II scanner capable of reading manufacturer-specific codes.
2. Attempt to start the vehicle with a known-good spare key. If it starts, the primary key is the issue.
3. If using a key fob, replace its internal battery as a precaution.
4. Check the main vehicle battery voltage to ensure it is above 12.4 volts. Charge or replace if necessary.
5. Observe the security light on the dash. Note if it is flashing rapidly, staying on solid, or off.
🎬 Watch this guide to reset your Chevrolet anti-theft system
6. Inspect the wiring and connector at the ignition switch and immobilizer antenna for any visible damage or looseness.
7. Using an advanced scan tool, access the Body Control Module (BCM) and/or immobilizer module data stream to check if the key is being recognized and if communication with the RIM and ECM is active.
8. If the key is not recognized, test the continuity and signal of the immobilizer antenna ring around the ignition cylinder.
9. If the antenna is good, inspect the power, ground, and communication wiring between the BCM, RIM, and ECM for faults, corrosion, or damage.
10. If all wiring and components test good, the BCM may be faulty and require professional testing and possibly replacement and programming.

Parts You'll Likely Need

• Ignition Key — The transponder chip inside the key is often the point of failure, either from damage or loss of programming.
  Trusted brands: ACDelco
  OEM price range: $100-$200
  Aftermarket price range: $50-$100
• Immobilizer Antenna / Transponder Reader (OEM #13539917) — This part reads the chip in the key. If it fails, the security signal is never sent to the BCM, causing a no-start. This part number is listed for 2015-2022 Trax models.
  Trusted brands: ACDelco, Genuine GM
  OEM price range: $70-$150
  Aftermarket price range: $40-$90

Related Codes That Often Appear With This One

• U-codes (e.g., U0140 - Lost Communication With Body Control Module) may be present, indicating a wider network communication issue.

Platform-Specific Known Issues

• The GM-specific definition 'Loss of RIM Serial Data' is a key diagnostic clue, pointing investigators toward a network communication fault rather than just a simple component failure like a key.

Mechanic-Grade Diagnostic Values

• Vehicle Battery Voltage (at rest) — expected: 12.4V - 12.8V. Failure: Below 12.4V indicates a weak battery that can cause module communication errors.
• Vehicle Battery Voltage (while cranking) — expected: >12.2V. Failure: A significant drop below 12.2V suggests a failing battery or high resistance in the starting circuit, which can disrupt module power.
• Immobilizer Antenna Signal — expected: LED on a dedicated coil tester flashes when the key is inserted/turned in the ignition.. Failure: No flash from the LED indicates a faulty antenna coil or no power being sent to it.

Scan Tool Commands That Help

• GDS2 / Tech2: Immobilizer Data Display — To monitor the status of the key, transponder, and communication signals between the BCM, RIM, and ECM to see which part of the security handshake is failing.
• GM Service Programming System (SPS): BCM or RIM Programming/Setup — This is required after replacing the Body Control Module (BCM) or Rear Integration Module (RIM). The new module must be programmed with the vehicle's VIN and security information to restore function.
• GDS2 / Tech2: Immobilizer Key Relearn — When a new key is being added or if the system has lost synchronization. This procedure programs the transponder ID of the key(s) to the immobilizer module.

Wiring & Ground Locations

• Body Control Module (BCM) — Located under the driver's side dashboard, often behind the lower knee bolster panel. It has multiple (often 7) different colored connectors.. The BCM is the central hub for the immobilizer system. All communication from the key, antenna, and RIM passes through it. A bad ground or loose connector here can cause P1614.
• Rear Integration Module (RIM) — On related GM platforms, the RIM is often located behind the rear seat back, typically on the driver's side.. The code P1614 specifically means "Loss of RIM Serial Data." Checking the connector and wiring at this module is a primary diagnostic step. Vibration can cause solder joint failure inside this module.
• Immobilizer Antenna Connector — The wiring for the antenna ring connects to the harness under the steering column covers.. This connector can become loose or corroded, preventing the key's signal from ever reaching the BCM, which would cause a no-start and could trigger a communication fault.

Diagnostic Flowchart

Other Known Issues on This Vehicle

Issues unrelated to this code that are worth knowing about as an owner of this generation:

• PCV System Failure / Torn Diaphragm 🔴 High — Very common. Can occur as early as 60,000 miles. Causes a loud whistling noise, rough idle, and P0171 lean code. (Ref: TSB 19-NA-114 (replaces PIP5197M) addresses diagnosis. The fix often requires replacing the entire valve cover, and sometimes the intake manifold as well.)
• Turbocharger Failure 🔴 High — Common, especially on higher-mileage vehicles or those with extended oil change intervals. Can be caused by failing coolant lines to the turbo or oil starvation. (Ref: GM issued a special coverage adjustment/warranty extension (N232395330) for some model years.)
• Coolant Leaks (Water Pump & Hoses) 🟠 Medium — Water pumps are a frequent failure point, leading to coolant loss and potential overheating. Hoses and coolant lines, particularly around the turbo, are also known to leak.
• Improperly Welded Lower Control Arms 🔴 High — Affected a specific range of vehicles but is a major safety concern. (Ref: Recall 18V586000 for 2015-2018 models. A joint could break, causing a partial separation of the control arm.)

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: A used Immobilizer Antenna (transponder reader coil) is a good candidate for a used part. It is a simple, non-programmed component, and a working unit from a donor vehicle is a cost-effective alternative to a new OEM part.

Donor-vehicle mileage cap: roughly under 120000 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• Ensure the plastic housing is not cracked or damaged.
• Check that the wiring pigtail and connector are intact with no cut or frayed wires.
• If possible, source from a vehicle that was not in a major front-end collision to reduce the risk of unseen damage.

OEM-only on this vehicle (don't cheap out):

• Body Control Module (BCM)
• Rear Integration Module (RIM)
• Ignition Key

Brands owners have reported issues with on this vehicle:

• Unbranded/No-Name Keys: Many cheap aftermarket keys from online marketplaces have transponder chips that fail to program or lose their programming quickly.
• Used BCM/RIM: These modules are VIN-locked to the original vehicle. While some specialists may be able to 'virginize' and reprogram them, it is a complex process with a high failure rate. It is not a plug-and-play solution and is generally not recommended.

Real Owner Stories

Aggregated from forums and TSBs cited above. Mileages and costs reflect what owners reported in those sources.

Related OBD-II Codes

• U-CODES — General network communication codes that often appear alongside P1614 if the BCM or wiring is failing, indicating a disruption in the data lines.
• P0171 — A lean code that frequently appears on the Trax platform due to PCV system failure (TSB 19-NA-114), which may be present as a secondary issue during a diagnostic scan.

Frequently Asked Questions