OBD-II code · Powertrain (generic, extended)
P2554 Throttle/Fuel Inhibit A Circuit Low
Throttle/fuel inhibit A reads stuck low — short to ground or permanently asserted. ECM may treat it as continuous inhibit and refuse normal operation.
Is it safe to drive with P2554?
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 ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- P218DThrottle/Fuel Inhibit B Circuit Low
- P2552Throttle/Fuel Inhibit A Circuit
- P2551Torque Management Request Input Signal B High
- P2553Throttle/Fuel Inhibit A Circuit Range/Performance
- P2555Throttle/Fuel Inhibit A Circuit High
- P2556Engine Coolant Level Sensor/Switch Circuit
- P2557Engine Coolant Level Sensor/Switch Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.