OBD-II code · Powertrain (generic, extended)
P2A66 Alternative Fuel Tank C Level Sensor Circuit Low
Voltage on the level sensor signal line of alternative fuel tank C is below the expected window. Wire shorted to ground or sensor short.
Is it safe to drive with P2A66?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySignal wire shorted to ground
- PossibleInternal sensor short
- Less likelyConnector pins corroded - high contact resistance
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Alt Fuel Tank C Level Sensor, Wiring Harness, Afcm
Related codes
- P01B1Alternative Fuel Tank A Level Sensor Circuit Low
- P2A61Alternative Fuel Tank B Level Sensor Circuit Low
- P2A63Alternative Fuel Tank B Level Sensor Circuit Intermittent/Erratic
- P2A64Alternative Fuel Tank C Level Sensor Circuit
- P2A65Alternative Fuel Tank C Level Sensor Range/Performance
- P2A67Alternative Fuel Tank C Level Sensor Circuit High
- P2A68Alternative Fuel Tank C Level Sensor Circuit Intermittent/Erratic
- P2A69Alternative Fuel Rail Pressure Regulator Pressure Sensor Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.