The OBD code P1639 for Ford indicates an issue with the Powertrain Control Module (PCM) reprogramming.
Symptoms include the Engine Light being ON.
Causes may include incorrect Vehicle Identification configuration.
This is a moderate issue.
To fix, review possible causes, visually inspect wiring harness and connectors for damage, and check connector pins for any issues.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
Symptoms of the Ford p1639 OBD Code
The vehicle may experience issues related to the clutch pedal position sensor circuit malfunction (Ford p1639).
- Symptoms: Service Engine Soon Warning Light ON.
- Vehicle may experience intermittent stalling.
- Engine may not start at times.
- Engine may run rough or have poor acceleration.
- Vehicle may go into limp mode, limiting performance.
Causes of the Ford p1639 OBD Code
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Possible triggers for Ford code P1639 include issues with the 4WD control module or wiring faults.
- P1639 can be caused by a faulty throttle position sensor.
- A broken wiring harness.
- Low voltage in the system.
- Corroded ground connections.
- Signal loss between the PCM and throttle actuator control module.
- Causes: Reprogram Module (Flashing), New Powertrain Control Module (PCM) Needs programming, Incorrect Vehicle Identification (VID) configuration.
Fixing Ford Error Code p1639 Step By Step
Address the issue by inspecting the PCM power relay circuit for potential faults or damage.
- To fix Ford OBDII code P1639, start by reviewing the possible causes mentioned above.
- Visually examine the wiring harness and connectors related to the transmission control module (TCM).
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Test the voltage supply to the TCM to ensure it is within specifications.
- If the wiring and connectors are in good condition and the voltage is correct, consider reprogramming or replacing the TCM as needed.
Cost Of Fixing Ford p1639 Fault Code
Diagnosing and repairing fault code P1639 on a Ford may involve testing and replacing components.
The cost to diagnose and fix the Ford OBD code P1639 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. The final cost may vary based on shop rates and the complexity of the repair.
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Details of the Ford p1639 OBD Code
Ford code P1639 relates to the 4WD control module torque reduction signal circuit malfunction.
Ford OBD code P1639 means the Traction Control System (TCS) torque reduction signal is not being received properly by the Powertrain Control Module (PCM).
This code is triggered by the PCM when it detects a communication error between the TCS module and itself.
The TCS module sends torque reduction signals to the PCM to control engine power during traction control events.
If the PCM does not receive these signals correctly, it will set code P1639.
Mechanic’s Tech Notes
Detailed information on Ford code p1639, including possible causes and diagnostic steps for resolution.
To diagnose and fix OBDII code P1639 in a Ford vehicle, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) network with a scan tool.
If the TCM does not respond, reprogramming or reflashing may be necessary.
Visually inspect the wiring harness and connectors for any damage, and ensure connector pins are not broken, bent, pushed out, or corroded.
This thorough inspection can help identify and address any issues causing the P1639 fault code.
FAQ
OBD code P1639 in a Ford indicates a reprogram module (flashing) issue. Check wiring harness, connectors, and PCM programming for faults.
Common symptoms for Ford fault code P1639 include Engine Light ON, caused by reprogramming module, new PCM needing programming, or incorrect VID configuration. Fix involves inspecting wiring and connectors.
Diagnose and repair OBD code P1639 in a Ford: Symptoms Engine Light ON, Causes Reprogram Module, New PCM Needs Programming, Incorrect VID Configuration. Fix: Inspect wiring, connectors for damage.
Wrap Up
If your Ford is displaying OBD code p1639, you may experience issues with the 4WD system engaging or disengaging unexpectedly.
This code typically points to a fault in the 4WD control module, faulty wiring connections, or a malfunctioning transfer case motor.
To address Ford OBD code p1639, start by inspecting the wiring harness and connectors related to the 4WD control module and transfer case motor.
Check for any loose connections, damaged wires, or corrosion that could be affecting the system’s operation.
If no visible issues are found, testing the components themselves may
