OBD-II code · Powertrain (generic, extended)
P218C Throttle/Fuel Inhibit B Circuit Range/Performance
Throttle/fuel inhibit B signal reads in range but plausibility fails — does not assert/release as expected.
Is it safe to drive with P218C?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInhibit logic mismatch
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Throttle Fuel Inhibit
Related codes
- P218BThrottle/Fuel Inhibit B Circuit
- P2553Throttle/Fuel Inhibit A Circuit Range/Performance
- P2189System Too Lean at Idle (Bank 2)
- P218AThrottle Actuator B Control System - Idle Position Not Learned
- P218DThrottle/Fuel Inhibit B Circuit Low
- P218EThrottle/Fuel Inhibit B Circuit High
- P218FReductant No Flow Detected
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.