Code result
P2553
Throttle/Fuel Inhibit A Circuit Range/Performance
Moderate severity
What it means
The throttle/fuel inhibit A signal is electrically intact but its value does not match the system context — for example asserted while the immobilizer reports OK, or de-asserted while a hybrid HV interlock is active. The ECM cannot trust the signal.
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
Requesting module sending an inconsistent value
highOne of the most commonly reported causes for this code — check this first.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Sensor mounting loose - signal damping
lowLess common, but worth ruling out after the more likely causes.
Related help
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