P1657 – Jaguar DTC

Jaguar DTC P1657 – Throttle motor relay, coil circuit ON – malfunction

DTC P1657 meaning on Jaguar

DTC P1657 for Jaguar indicates a malfunction in the throttle motor relay coil circuit. This fault code is triggered when the Engine Control Module (ECM) detects an issue with the operation of the throttle motor relay coil circuit.

Jaguar DTC P1657 symptoms

Symptoms of DTC P1657 on a Jaguar may include:

• Engine stalling or hesitation
• Reduced engine power
• Difficulty accelerating
• Illuminated Check Engine Light

Jaguar DTC P1657 causes

Common causes of DTC P1657 on a Jaguar include:

• Faulty throttle motor relay
• Defective throttle motor relay coil
• Wiring or connection issues in the throttle motor relay circuit

Jaguar DTC P1657 seriousness

DTC P1657 should be addressed promptly as it can lead to drivability issues and potential safety concerns. Ignoring this fault code may result in further damage to engine components.

How to diagnose DTC P1657 on Jaguar

To diagnose DTC P1657 on a Jaguar, a mechanic should perform the following steps:

1. Use a diagnostic scan tool to retrieve the fault code and related data
2. Inspect the throttle motor relay and its connections for any visible damage
3. Test the throttle motor relay coil for proper operation
4. Check the wiring harness for continuity and shorts

How to fix DTC P1657 on Jaguar

To fix DTC P1657 on a Jaguar, the following steps can be taken:

1. Replace the faulty throttle motor relay if necessary
2. Repair or replace any damaged wiring or connections in the throttle motor relay circuit
3. Clear the fault code from the ECM memory after completing repairs

How to erase DTC P1657 on Jaguar

To erase DTC P1657 on a Jaguar, follow these steps:

1. Use a diagnostic scan tool to access the ECM
2. Select the option to clear fault codes or reset the ECM
3. Confirm the deletion of the fault code and ensure it does not reappear during testing

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