Powertrain, generic (extended)

P212F Throttle/Pedal Position Sensor/Switch F/G Voltage Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

One sensor track worn or drifted so the pair disagrees
Contact resistance in the connector shifting one signal
Fault in a shared ground or 5 V reference line

Symptoms

  • Engine or throttle warning lamp on
  • Reduced power or limp mode
  • Hesitant response to the pedal

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–700
Time0.5–2.5 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

throttle position sensoraccelerator pedal position sensor

Related codes

P212BP212EP2130P2139P2140P210E

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com.