Code result
P2554
Throttle/Fuel Inhibit A Circuit Low
Moderate severity
What it means
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?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Inhibit wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Harness chafing through insulation
lowLess common, but worth ruling out after the more likely causes.
Related help
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