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.
General code reference. Confirm the definition and diagnostic procedure for your vehicle's year, model and engine. A stored code alone does not identify a failed part.
Affected components
- Throttle inhibit a
Possible causes to check
These are possible checks, not a ranked diagnosis. Follow the vehicle manufacturer's test procedure before replacing parts.
- Inhibit wire shorted to ground
- Connector pins corroded - high contact resistance
- Harness chafing through insulation
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Check each reference's vehicle and model-year scope. General background links do not establish which fault is most likely on your vehicle.
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.