[SOLVED] Dodge P1689 Code: Ecm And Injection Pump Communication Fix

The OBD code P1689 for Dodge indicates a fault with the Fuel Pump Control Module (FPCM).

Symptoms include the Engine Light being ON.

This code affects the fuel system.

Causes may include a faulty FPCM, open or shorted FPCM harness, or poor electrical connection.

It is a serious issue as it can affect fuel delivery.

To fix, inspect wiring harness, connectors, and components for damage or corrosion.

Repair Importance Level	10.0 (Out of 10)
Estimated Repair Time	Approximately 1.0 hour
Repair Difficulty Level	10.0 (Out of 10)

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Symptoms of the Dodge p1689 OBD Code

The Dodge P1689 fault code indicates a problem with the ECM communication circuit.

Symptoms: Engine Light ON.
Vehicle may experience a nostart condition.
Engine may stall while driving.
Engine may lack power or have poor acceleration.
Vehicle may go into limp mode.

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Causes of the Dodge p1689 OBD Code

Possible reasons for Dodge fault code p1689 include issues with the ECM, wiring, or communication network.

P1689 can be caused by a faulty Fuel Pump Control Module (FPCM).
A Fuel Pump Control Module (FPCM) harness that is open or shorted.
A Fuel Pump Control Module (FPCM) circuit with poor electrical connection.

Fixing Dodge Error Code p1689 Step By Step

Repair the ground connection at the fuel injection pump relay for Dodge fault code P1689.

To fix the Dodge OBDII code P1689, start by reviewing the possible causes mentioned above.
Visually examine the wiring harness and connectors related to the injection pump module.
Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
If no issues are found with the wiring and connectors, consider reprogramming or replacing the injection pump module as necessary.

Cost Of Fixing Dodge p1689 Fault Code

Diagnosing and repairing Dodge fault code P1689 may involve inspecting the fuel injection pump control circuit.

The cost to diagnose and fix the Dodge OBD code P1689 depends on the estimated 1. 0hour repair time.

Labor rates usually range from $75 to $150 per hour, so the total cost could be between $75 and $150. Actual cost may vary based on shop rates and the complexity of the repair.

Details of the Dodge p1689 OBD Code

Dodge fault code P1689 indicates an ECM communication issue with the injection pump module.

Dodge OBD code P1689 means No Communication Between ECM & Injection Pump Module.

This code is triggered when the Engine Control Module (ECM) fails to receive a signal from the Injection Pump Module (IPM) within a specified time frame.

The IPM is responsible for controlling the fuel delivery to the engine.

When communication between the ECM and IPM is lost, it can lead to drivability issues and potentially cause the engine to stall.

Mechanic’s Tech Notes

Detailed information on Dodge fault code P1689, indicating an internal ECM communication error.

OBDII code P1689 in a Dodge typically points to an issue with the transmission control module (TCM) power or ground circuits.

To diagnose, use a multimeter to check TCM power and ground connections for proper voltage and continuity.

Additionally, scan tools can help verify TCM communication over the Controller Area Network (CAN) network.

If wiring and connectors appear intact, consider TCM reprogramming or replacement.

Ensure to inspect wiring harnesses and connectors for any damage, corrosion, or pin issues.

Reflashing the TCM may resolve the fault.

FAQ

1. What are the common symptoms associated with OBD code P1689 in a Dodge vehicle?

Common symptoms of OBD code P1689 in a Dodge vehicle include the Engine Light ON and potential issues with the Fuel Pump Control Module (FPCM) or its circuit.

2. What are the possible causes of OBD code P1689 in a Dodge vehicle?

Possible causes of OBD code P1689 in a Dodge vehicle include a faulty Fuel Pump Control Module (FPCM), open/shorted FPCM harness, or poor electrical connection.

3. How can I diagnose and fix OBD code P1689 in my Dodge vehicle?

Diagnose and fix OBD code P1689 in Dodge: Symptoms Engine Light ON. Causes Faulty FPCM, open/shorted harness, poor connection. Fix Inspect wiring, connectors, and components for damage.

Wrap Up

If your Dodge is displaying OBD code p1689 along with intermittent stalling, rough idling, or difficulty starting, it may indicate a communication error between the ECM and the injection pump module.

This could be caused by faulty wiring connections, a damaged ECM, or a malfunctioning injection pump module.

To address Dodge OBD code p1689, start by inspecting the wiring harness between the ECM and the injection pump module for any signs of damage or corrosion.

Check the connectors for proper seating and signs of wear.

Consider testing the ECM and the injection pump module for proper functionality to pinpoint the