P212FThrottle/Pedal Position Sensor/Switch F/G Voltage Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P212F checks whether the two redundant signals F and G still agree in voltage. No manufacturer documents this code publicly, and the letters make it an unusual pair: GM's 2004-2005 truck tables use F for the third accelerator pedal track, while GM's 2023 table assigns G to the second sensor of a bank 2 throttle body. A meaningful F/G comparison therefore needs a layout where both letters sit on the same component, for example a second throttle body with two tracks. Comparable checks are documented under P2135 and P2138, where GM and Ford store a fault when two tracks differ by a few percent or degrees. A drifting track, contact resistance or a shared ground fault are the plausible causes; the ECU then limits power.
- What you may notice
- Engine or throttle warning lamp on
- Reduced power or limp mode
- Hesitant response to the pedal
- Likely causes
- LikelyOne sensor track worn or drifted so the pair disagrees
- PossibleContact resistance in the connector shifting one signal
- PossibleFault in a shared ground or 5 V reference line
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.