OBD-II code · Powertrain (generic, extended)
P2555 Throttle/Fuel Inhibit A Circuit High
Throttle/fuel inhibit A reads stuck high — short to battery voltage. ECM cannot read the inhibit state and falls back to the safe default.
Is it safe to drive with P2555?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInhibit wire shorted to battery voltage
- Less likelyConnector pins corroded - high contact resistance
- Less likelySupply wire pinched against B+ source
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Throttle Inhibit A
Related codes
- P218EThrottle/Fuel Inhibit B Circuit High
- P2552Throttle/Fuel Inhibit A Circuit
- P2553Throttle/Fuel Inhibit A Circuit Range/Performance
- P2554Throttle/Fuel Inhibit A Circuit Low
- P2556Engine Coolant Level Sensor/Switch Circuit
- P2557Engine Coolant Level Sensor/Switch Circuit Range/Performance
- P2558Engine Coolant Level Sensor/Switch Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.