OBD-II code · Powertrain (generic, extended)
P2668 Fuel Mode Indicator Lamp Control Circuit
The fuel mode indicator lamp circuit (showing whether a bi-fuel vehicle currently runs on gasoline or alternative fuel) is faulty. Driver may not know the active fuel.
Is it safe to drive with P2668?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyBurnt-out indicator bulb
- PossibleOpen or shorted wire to the cluster
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1 h
- Emissions test
- Usually unaffected
- Parts involved
- Fuel Mode Lamp, Instrument Cluster, Wiring Harness
Related codes
- P2665Fuel Shutoff Valve B Control Circuit / Open
- P2666Fuel Shutoff Valve B Control Circuit Low
- P2667Fuel Shutoff Valve B Control Circuit High
- P2669Actuator Supply Voltage B Circuit / Open
- P266AA Rocker Arm Actuator Position Sensor Circuit Bank 2
- P266BA Rocker Arm Actuator Position Sensor Circuit Range/Performance Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.