P1688 – Chrysler DTC

Chrysler DTC P1688 – Internal Fuel Injection Pump Controller Failure

DTC P1688 meaning on Chrysler

DTC P1688 on Chrysler indicates an Internal Fuel Injection Pump Controller Failure. This fault code is related to the fuel injection system’s control module malfunction.

Chrysler DTC P1688 symptoms

• Check Engine Light (CEL) illuminated on the dashboard
• Engine may run rough or misfire
• Reduced engine performance
• Difficulty starting the vehicle

Chrysler DTC P1688 causes

• Internal failure within the fuel injection pump controller
• Wiring or connection issues related to the fuel injection system
• Faulty fuel injection pump

Chrysler DTC P1688 seriousness

The seriousness of DTC P1688 on Chrysler depends on the extent of the internal fuel injection pump controller failure. Ignoring this issue can lead to poor engine performance, potential stalling, and further damage to the fuel injection system.

How to diagnose DTC P1688 on Chrysler

1. Use a diagnostic scanner to retrieve the fault code and related data
2. Inspect the wiring and connections in the fuel injection system
3. Check the fuel injection pump for proper operation

How to fix DTC P1688 on Chrysler

1. Replace the internal fuel injection pump controller if found faulty
2. Repair any damaged wiring or connections in the fuel injection system
3. If the fuel injection pump is defective, replace it with a new unit

How to erase DTC P1688 on Chrysler

1. After fixing the underlying issue, use a diagnostic scanner to clear the fault code
2. Ensure that the repair has resolved the problem before clearing the code