P1668: PCM - IDM Communications Error
LowPowertrainEngine/Powertrain
What does P1668 mean?
P1668 is a diagnostic trouble code indicating "PCM - IDM Communications Error". This code relates to your vehicle's engine/powertrain and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Common causes
- Faulty engine/powertrain component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
This is a minor or informational code. Monitor for any changes in vehicle behaviour and address it during your next scheduled service visit.
Get a diagnosis for YOUR car
Code P1668 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.