P1664
Injection Pump Control Module Faulty
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)
Symptoms
- Unstable engine operation
- Problems starting the engine
- Reduced engine power
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Malfunction of the fuel injection pump control module
- Problems with wiring to the module
- Bad contacts in connectors
- Mechanical damage to fuel injection pump
- ECU software failure
How to Fix
- Check the condition of the wiring and connectors
- Test the injection pump control module
- Replace the control module if necessary
- Update ECU firmware
- Check the operation of the injection pump itself