P2668 Possible Causes
- Faulty fuel mode indicator
- Fuel mode indicator lamp circuit open or shorted
- Fuel mode indicator lamp circuit Poor electrical connection
How to Fix Code P2668
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
Illuminated engine light (or service engine soon warning light)
P2668 Meaning
The Engine Control Module (ECM) monitors the fuel mode indicator lamp control circuit. The ECM sets the OBDII code when the fuel mode indicator lamp control circuit is outside factory specifications.