P0627 on 2009-2013 Ram 1500 4.7L V8: Fuel Pump Control Circuit Fixes

What's Unique About the 2009-2018 Ram 1500

The 2009-2013 Ram 1500, like many Chrysler products of this era, uses a Totally Integrated Power Module (TIPM-7) that combines the fuse box with various electronic control modules. A notorious design flaw is that the fuel pump relay is soldered directly onto the TIPM's internal circuit board, making it non-serviceable. This internal relay is prone to premature failure from contact erosion and spring deformation, leading directly to the P0627 code and a no-start condition. This is such a common problem that numerous aftermarket bypass kits have been developed specifically to solve it without replacing the entire expensive TIPM unit.

Generation note: The user-specified range of 2009-2018 covers the entire fourth generation (DS/DJ) of the Ram 1500. However, the 4.7L V8 PowerTech engine was only available from the 2009 to 2013 model years. This guide is specific to the 2009-2013 models with the 4.7L engine, which are known to have the TIPM-7 fuel relay issue. Later models (2013/2014+) used a Power Distribution Center (PDC) which is a different architecture.

Symptoms You May Notice

• Engine cranks but will not start
• Engine takes multiple attempts to start
• Sudden engine stalling while driving
• Illuminated Check Engine Light
• No humming/priming sound from the fuel tank when the key is turned to 'ON'

Most Likely Causes

1. Failed Internal Fuel Pump Relay in TIPM 🔴 High Probability This is a well-documented, widespread design flaw in Chrysler's TIPM-7 fuse boxes. The non-serviceable relay overheats and fails, breaking the fuel pump power circuit. This issue was the subject of a major class-action lawsuit.
   How to confirm: Listen for the fuel pump to prime (a 1-2 second hum from the rear of the truck) when the key is turned to the 'ON' position. If there is no sound and the engine won't start, the relay is the likely culprit. Tapping the TIPM (fuse box) can sometimes temporarily restore connection and allow the truck to start, further indicating a faulty relay.
   Typical fix: Install an external fuel pump relay bypass kit. This is a simple, plug-and-play fix that bypasses the faulty internal relay. The alternative is a complete, and very expensive, TIPM replacement or rebuild.
   Est. part cost: $30-$70 for a bypass kit, $800-$1500 for a new TIPM.
2. Failed Fuel Pump Assembly 🟡 Medium Probability Fuel pumps are a wear-and-tear item and can fail over time. While less common than the TIPM issue for this specific code, it's the next logical component to fail in the circuit.
   How to confirm: If the TIPM relay is confirmed to be working (or has been bypassed) and the truck still won't start, check for 12V power at the fuel pump connector. If 12V is present at the connector when the key is turned on but the pump doesn't run, the pump has failed. The pump should operate at a pressure of 55-65 PSI.
   Typical fix: Replace the in-tank fuel pump module. This requires either lowering the fuel tank or lifting the truck bed for access. 🎬 Watch: Step-by-step guide to replacing the fuel pump assembly
   Est. part cost: $200-$400 for an aftermarket assembly, $500+ for OEM.
3. Damaged Wiring or Connectors ⚪ Low Probability The wiring harness running along the frame to the fuel tank is exposed to road debris, moisture, and corrosion, which can cause an open or short in the circuit. The control circuit wire from the PCM to the TIPM is specifically designated as the (K31) Fuel Pump Control circuit in service manuals.
   How to confirm: Visually inspect the wiring harness from the TIPM to the fuel tank. Check for chafed, broken, or corroded wires, especially at the connector on top of the fuel tank. Perform a continuity test on the (K31) wire between the PCM and TIPM connectors; resistance should be below 5.0 Ohms.
   Typical fix: Repair the damaged section of the wire or replace the corroded connector.
   Est. part cost: $10-$50

Rare But Worth Checking

• Failed Powertrain Control Module (PCM): This is very rare. The PCM is responsible for sending the signal to the TIPM to activate the relay. Before condemning the PCM, all other possibilities (TIPM, pump, wiring) must be exhaustively ruled out.

Diagnosis Steps

1. Turn the ignition key to the 'ON' position (without starting) and listen for a 1-2 second humming sound from the fuel tank area. This is the fuel pump priming.
2. If no sound is heard, the fuel pump is not getting power. The most likely cause is the TIPM.
3. As a quick test, try tapping firmly on the top of the TIPM (fuse box) cover with the handle of a screwdriver while an assistant tries to start the engine. If the truck starts, this strongly confirms a bad internal relay in the TIPM.
4. Inspect the M25 (20A) fuse in the TIPM, which is for the fuel pump. If the fuse is good, proceed.
5. The most definitive diagnosis is to install a TIPM fuel pump relay bypass cable. These kits typically plug into specific slots in the TIPM to reroute power from another source (like an accessory power slot) to the fuel pump circuit, bypassing the internal relay. If the truck starts and runs with the bypass cable, the internal TIPM relay is faulty.
6. If a bypass cable is installed and the truck still does not start, use a multimeter to check for 12V power and a good ground at the fuel pump electrical connector when the key is first turned on.
7. If power and ground are present at the connector but the pump does not run, the fuel pump itself has failed and needs to be replaced.
8. If no power is present at the connector even with a bypass, inspect the wiring harness between the TIPM and the fuel tank for breaks or corrosion. Pay special attention to the (K31) Fuel Pump Control circuit wire if you have access to a wiring diagram.

Parts You'll Likely Need

• TIPM Fuel Pump Relay Bypass Kit — This is the most common and cost-effective solution for the P0627 code on this vehicle, as it bypasses the known failure point (the internal TIPM relay) without requiring replacement of the entire module.
  Trusted brands: Vertical Visions, MAKS TIPM Rebuilders, Dorman
  OEM price range: N/A
  Aftermarket price range: $30-$70
• Totally Integrated Power Module (TIPM) (OEM #Example for 2011: 4692319AJ; Example for 2012: 68089323AF (Varies by year/VIN)) — This is the complete fuse box assembly. It is the official, though most expensive, repair if the internal fuel pump relay has failed and you do not wish to use a bypass kit. Remanufactured units are a popular alternative.
  Trusted brands: Mopar
  OEM price range: $1200-$2100
  Aftermarket price range: $500-$1000 (remanufactured)
• Fuel Pump Module Assembly (OEM #Example: 68050948AB (replaces 68050948AA). Varies by year and tank size.) — If the TIPM and wiring are confirmed to be good, the fuel pump itself is the next most likely point of failure in the circuit.
  Trusted brands: Bosch, Delphi, Spectra Premium, Mopar
  OEM price range: $500-$750
  Aftermarket price range: $200-$400

Related Codes That Often Appear With This One

• P062A — Stands for 'Fuel Pump 'A' Control Circuit Range/Performance'. It often appears with P0627 as both codes relate to the PCM's inability to properly control and verify the operation of the fuel pump circuit, commonly due to the same TIPM fault.
🎬 See a detailed breakdown of the P0627 trouble code

Platform-Specific Known Issues

• A class-action lawsuit, Velasco, et al. v. Chrysler Group LLC, was filed against Chrysler (FCA) regarding defective TIPMs in various 2007-2014 vehicles, citing the fuel pump relay failure that could cause engine stalling or no-start conditions.
• FCA issued safety recall P54 (NHTSA 14V-530) for the same TIPM fuel pump relay issue, but it was officially for 2011-2013 Jeep Grand Cherokee and Dodge Durango models. While the Ram 1500 was not officially included in that specific recall, it uses a similar TIPM-7 and suffers from the identical failure mode.

Mechanic-Grade Diagnostic Values

• Battery Voltage (Pre-Condition for Test) — expected: Greater than 10.4 Volts. Failure: Testing may not be reliable below this voltage.
• Fuel Pump Control Circuit (K31) State — expected: The PCM pulls the circuit low (grounds it) to request fuel pump activation.. Failure: Circuit is not pulled low when commanded by scan tool, or shows a constant short to ground.
• Continuity of (K31) Fuel Pump Control Circuit — expected: Below 5.0 Ohms. Failure: Resistance above 5.0 Ohms indicates an open or high resistance in the wire between the PCM and TIPM.
• Voltage at Fuel Pump Connector (harness side) — expected: Approximately 12V for 1-2 seconds when key is first turned to ON, and constant 12V while cranking.. Failure: No voltage present indicates a problem upstream (TIPM, wiring).

Scan Tool Commands That Help

• Chrysler WiTech or equivalent professional scan tool: Fuel Pump Actuation Test — This bidirectional command is used to manually force the PCM to activate the fuel pump control circuit. If the pump runs during the test, it confirms the PCM, TIPM (internal logic, not necessarily the relay), wiring to the pump, and the pump itself are likely functional, pointing towards a trigger or activation issue. If it doesn't run, it helps isolate the fault within that circuit.

Wiring & Ground Locations

• (K31) Fuel Pump Control Circuit — Wire running between the Powertrain Control Module (PCM) and the Totally Integrated Power Module (TIPM).. This is the specific signal wire the PCM uses to command the TIPM to turn on the fuel pump. An open or short on this wire is a direct cause of P0627.
• TIPM Connector C1 — One of the large multi-pin harness connectors on the underside of the TIPM (fuse box).. This connector contains the (K31) wire. Technicians disconnect it to test for shorts to ground or continuity on that circuit.
• PCM Connector C3 — One of the large multi-pin harness connectors at the Powertrain Control Module.. This is the other end of the (K31) circuit. Disconnecting it is necessary to isolate the wire for continuity testing.
• Fuel Pump Power Wire — At the fuel pump module connector on top of the fuel tank. Wire color can be Dark Blue with an Orange tracer or Blue with a Red tracer depending on the specific year and harness.. This is the wire that should have ~12V when the pump is commanded on. Checking for voltage here is the final confirmation of whether power is reaching the pump.
• Fuel Pump Ground Wire — A Black wire in the same connector as the power wire on top of the fuel tank.. A bad ground connection can prevent the pump from running even if it's receiving 12V power.

Real Owner Repair Stories

• RamForum.com user Keewee89 (2011 Ram 1500 4.7L) — Intermittent crank-no-start, progressively getting worse, especially in cold weather. Noticed the fuel pump would not prime (hum) on failed start attempts. Eventually became a permanent no-start.
  ❌ Tried (didn't work) Replaced the fuel pump assembly.
  ✅ What actually fixed it After the new pump did not fix the issue, the owner confirmed there was no power getting to the pump. They concluded the TIPM was bad and ordered an external relay bypass kit to solve the problem.
• YouTube mechanic for customer's truck (Dodge Ram (year not specified, but has TIPM)) — Intermittent no-start condition.
  ❌ Tried (didn't work) Replaced the fuel pump with an OEM unit. The problem returned.
  ✅ What actually fixed it Installed a Vertical Visions TIPM bypass kit. The truck started immediately and ran correctly, confirming the root cause was the faulty internal TIPM relay, not the fuel pump that was previously replaced.

Model Year Variations Within This Range

• 2009-2012: These years are confirmed to use the TIPM-7 architecture which combines fuse/relay functions with a body control module, and is highly susceptible to the internal fuel pump relay failure.
• 2013+: Starting around 2013-2014, Ram trucks transitioned to using a Power Distribution Center (PDC), which is a more traditional fuse and relay box without the integrated control module functions of the TIPM. While electrical issues can still occur, they do not suffer from the specific, widespread internal relay design flaw of the TIPM-7.

Diagnostic Flowchart

Other Known Issues on This Vehicle

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

• Broken Exhaust Manifold Bolts 🟠 Medium — Very common, often occurs between 50k-100k miles. Causes a ticking noise, especially on cold starts, that may quiet down as the engine warms up.
• Water Pump Failure 🟠 Medium — The 4.7L V8 is known to be sensitive to overheating, and water pump failures are a common cause. Leaks from the weep hole or a noisy bearing are early signs.
• HVAC Blend Door Actuator Failure 🟡 Low — Common across all 4th Gen Rams. Results in clicking noises from the dash and/or inability to control air temperature on one or both sides of the cabin.
• Third Brake Light Gasket Leak 🟡 Low — The foam gasket for the high-mount stop lamp deteriorates, allowing water to leak into the cab, often staining the headliner or soaking the rear carpets.

Used vs. New Parts: Buying Guide for This Vehicle

When a used part is the smart pick: For this specific repair, a used part is almost never a smart choice for the primary failed components. A used wiring harness pigtail or connector from a junkyard is acceptable if you are repairing a damaged connector.

Donor-vehicle mileage cap: roughly under 1 miles for the part to have meaningful remaining life.

What to inspect on the donor part:

• For a TIPM, check for any signs of water intrusion, heavy corrosion on external pins, or melted plastic. However, visual inspection cannot determine the health of the internal fuel pump relay.
• For a fuel pump, there are no reliable visual cues. It's a sealed unit and a wear item.

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

• Totally Integrated Power Module (TIPM): If you choose to replace the entire unit instead of using a bypass, using an OEM Mopar unit (new or professionally remanufactured) is strongly recommended. A used TIPM is a significant gamble as it may have the same defect or be close to failing.

Aftermarket brands forum-validated for this vehicle:

• TIPM Bypass Kit: Vertical Visions and MAKS TIPM Rebuilders are highly regarded brands with products frequently recommended on forums and by mechanics.
• Fuel Pump Assembly: Delphi and Bosch are reputable Tier 1 suppliers that are generally considered reliable aftermarket alternatives to OEM.

Brands owners have reported issues with on this vehicle:

• Be cautious with unbranded, exceptionally low-cost fuel pump assemblies from online marketplaces. Fuel pumps are a critical component, and premature failure is common with lower-quality units.

Real Owner Stories

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

Related OBD-II Codes

• P062A — Fuel Pump 'A' Control Circuit Range/Performance. This code is often set along with P0627 as it indicates a performance problem in the same circuit, which is a direct result of the intermittent or failed power supply from the faulty TIPM relay.
• P0231 — Fuel Pump Secondary Circuit Low. This code can be triggered by the same faulty components as P0627. It indicates a short to ground or low voltage condition in the circuit, which can be caused by a failing TIPM relay or damaged wiring harness.
• P0232 — Fuel Pump Secondary Circuit High. A companion code indicating a short to power in the fuel pump circuit. A faulty TIPM relay could potentially fail in a 'stuck on' or shorted state, causing this condition instead of an open circuit (P0627).
• U0100 — Lost Communication With ECM/PCM. The TIPM is a central power and data communications hub. An internal failure, such as the fuel pump relay issue, can cause electrical instability that disrupts the CAN bus network, leading to communication codes with the main engine computer.

Frequently Asked Questions