Powertrain, generic (extended)

P2131 Throttle/Pedal Position Sensor/Switch F Circuit Range/Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2131 means pedal track F is electrically intact but disagrees with the rest of the pedal. Two makers document it for three-track pedals. GM's 2004-2005 truck tables scale APP sensor 3 to the range of the other tracks and set P2131 only when it strays more than 0.26 V from each of the other two sensors, so the majority vote singles out track F; the counter runs every 3 ms and trips at 167 (Type C in 2004, Type A in 2005). Ford's 2012 summary sets it on second-generation ETC when F departs from the others by over 1.1 degrees, lighting the wrench lamp without MIL. Circuit faults on F are P2130 and P2132-P2134. The car stays drivable; the ECU follows the two healthy tracks and softens pedal response.

Likely causes

Worn or dirty track F giving an offset reading
Contact resistance at the pedal connector
Bent pedal bracket or binding mechanism distorting one track

Symptoms

  • Wrench or engine warning lamp on
  • Softened, slower acceleration
  • Often no noticeable change while driving

Repair estimate

DifficultyEasyDIY possible
Parts and labour€20–350
Time0.3–1.5 h

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

Parts involved

throttle position sensoraccelerator pedal position sensor

Related codes

P2130P2132P2133P2134P2139P2140

References: gsi.ext.gm.com, newtonnet.co.uk, gsi.ext.gm.com.