Powertrain, generic (extended)

P2124 Throttle/Pedal Position Sensor/Switch D Circuit Intermittent

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2124 covers brief dropouts or spikes on pedal track D that come and go too quickly to count as a steady low or high fault. Ford documents it: special service messages 46829 (2015-2017 F-150) and 46880 (2017 Super Duty built up to late August 2017) tie P2124, alongside other pedal codes and wrench, ABS, airbag and hill descent lamps, to a pedal harness routed behind the bracket between brake booster and brake pedal, where it gets pinched and damaged. GM publishes no separate intermittent code for track D and catches such glitches through the 19-of-39 counter of P2120, P2122 and P2123. Inspect the harness while moving the pedal slowly. Effects range from a passing warning lamp to sudden loss of pedal response.

Likely causes

Pedal harness pinched or chafed by a misrouted path
Loose terminal or weak pin tension at the pedal connector
Worn spot on track D inside the pedal sensor

Symptoms

  • Warning lamps that come and go, sometimes several at once
  • Brief loss of pedal response while driving
  • Reduced power mode after repeated dropouts

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–400
Time0.5–2.5 h

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

Parts involved

accelerator pedal position sensorpedal sensor wiringecm

Related codes

P2120P2122P2123P2129P2138

References: static.nhtsa.gov, static.nhtsa.gov, gsi.ext.gm.com, law.cornell.edu.