P1690 – Dodge DTC

Dodge DTC P1690 – Fuel injection pump CKP Sensor Does Not Agree With ECM CKP Sensor

DTC P1690 meaning on Dodge

DTC P1690 on a Dodge indicates that the Fuel Injection Pump Controller (FIPC) has detected a discrepancy between the Crankshaft Position (CKP) sensor signal received by the Engine Control Module (ECM) and the signal received by the Fuel Injection Pump (FIP) module.

Dodge DTC P1690 symptoms

Symptoms of DTC P1690 on a Dodge may include:

• Engine misfires or rough idling
• Loss of power or acceleration
• Difficulty starting the engine
• Check Engine Light (CEL) illuminated on the dashboard

Dodge DTC P1690 causes

Common causes of DTC P1690 on a Dodge include:

• Faulty CKP sensor
• Wiring issues or poor connections between the CKP sensor and ECM/FIP
• Defective ECM or FIP module
• Issues with the fuel injection pump

Dodge DTC P1690 seriousness

DTC P1690 should be addressed promptly as it can lead to drivability issues and potential engine damage if left unresolved. Ignoring this code may result in poor engine performance and increased fuel consumption.

How to diagnose DTC P1690 on Dodge

To diagnose DTC P1690 on a Dodge, follow these steps:

1. Use a scan tool to retrieve the fault codes stored in the ECM.
2. Inspect the CKP sensor and its wiring for any visible damage or corrosion.
3. Check the connections between the CKP sensor, ECM, and FIP for proper continuity.
4. Perform a CKP sensor signal test using a multimeter to verify its operation.

How to fix DTC P1690 on Dodge

To fix DTC P1690 on a Dodge, consider the following:

1. Replace the faulty CKP sensor if it is found to be defective.
2. Repair any damaged wiring or connectors related to the CKP sensor circuit.
3. If necessary, replace the ECM or FIP module if they are determined to be faulty.
4. Ensure proper alignment and synchronization of the CKP sensor with the engine components.

How to erase DTC P1690 on Dodge

To erase DTC P1690 on a Dodge:

1. Use a scan tool to clear the fault codes stored in the ECM memory.
2. After clearing the codes, perform a test drive to verify that the issue has been resolved.
3. If the Check Engine Light does not reappear, the DTC P1690 has been successfully erased.

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