P2552: Throttle/Fuel Inhibit A Circuit
Standardized SAE J2012 code · P25xx — Auxiliary inputs
What does P2552 mean?
General electrical fault on the throttle/fuel inhibit input A. This input lets external safety functions (immobilizer, hybrid HV interlock, anti-theft) override the throttle or cut fuel delivery. With the input invalid the safety override is unreliable, so the ECM falls back to its safe default — typically inhibit asserted to err on the side of safety.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Open or shorted inhibit wire
Likelihood is a general estimate across vehicles; your make and model may differ.
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