OBD-II code · Powertrain (generic, extended)
P2552 Throttle/Fuel Inhibit A Circuit
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.
Is it safe to drive with P2552?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen or shorted inhibit wire
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–2 h
- Emissions test
- Usually unaffected
- Parts involved
- Throttle Inhibit A
Related codes
- P218BThrottle/Fuel Inhibit B Circuit
- P254FEngine Hood Switch Circuit
- P2550Torque Management Request Input Signal B Low
- P2551Torque Management Request Input Signal B High
- P2553Throttle/Fuel Inhibit A Circuit Range/Performance
- P2554Throttle/Fuel Inhibit A Circuit Low
- P2555Throttle/Fuel Inhibit A Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.