OBD-II code · Powertrain (generic, extended)
P2553 Throttle/Fuel Inhibit A Circuit Range/Performance
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 with P2553?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyRequesting module sending an inconsistent value
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.5–3 h
- Emissions test
- Usually unaffected
- Parts involved
- Throttle Inhibit A
Related codes
- P218CThrottle/Fuel Inhibit B Circuit Range/Performance
- P2552Throttle/Fuel Inhibit A Circuit
- P2550Torque Management Request Input Signal B Low
- P2551Torque Management Request Input Signal B High
- P2554Throttle/Fuel Inhibit A Circuit Low
- P2555Throttle/Fuel Inhibit A Circuit High
- P2556Engine Coolant Level Sensor/Switch Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.