Powertrain, generic (extended)

P2164 Throttle/Pedal Position Sensor B Maximum Stop Performance

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2164 is the full-travel test for position signal B. When the throttle or pedal is held at its upper stop, sensor B has to report a value inside a calibrated band; a reading or learned maximum outside that band sets the code. Ford and GM call their second throttle body sensor B, so on those designs the code points at the throttle body, yet no manufacturer documents P2164 publicly. The nearest evidence is Ford's listing of the A version P2163 and a Visteon patent that learns the open stop and rejects values beyond about 80 to 110 degrees. On many throttle bodies the second track runs opposite to the first, so comparing A and B at full opening helps to tell a sensor fault from a mechanical block. P2113 checks the closed stop of B; P0220-P0223 cover its circuit.

Likely causes

Sensor B track worn or drifted at the full-open end
Deposits or a damaged stop limit the plate travel
Corroded contact on the sensor B signal or reference pin
End positions not relearned after part replacement

Symptoms

  • Engine warning lamp on
  • Power limited at high throttle demand
  • Occasional limp mode

Repair estimate

DifficultyMediumDIY possible
Parts and labour€0–600
Time0.3–2 h

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

Parts involved

throttle position sensoraccelerator pedal position sensor

Related codes

P2113P2163P2165P0221P2135

References: patents.google.com, performanceparts.ford.com, law.cornell.edu.