P2553: Throttle/Fuel Inhibit A Circuit Range/Performance
Standardized SAE J2012 code · P25xx — Auxiliary inputs
What does P2553 mean?
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.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Requesting module sending an inconsistent value
- Low Sensor element aged beyond calibration window
- Low Sensor mounting loose - signal damping
Likelihood is a general estimate across vehicles; your make and model may differ.
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P2553 in the community
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