Powertrain, generic · Fuel and air metering (injector circuit)

P0223 Throttle/Pedal Position Sensor/Switch B Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With electronic throttle control the throttle body carries two position sensors, A and B, usually with opposite or offset signals, and the engine module compares them (correlation code P2135). GM and Ford give the pedal sensors their own codes (P2120 ff), so B is in practice the second throttle sensor. P0223 means the signal of sensor B is above its upper limit – GM above 4.59 V, Ford above 4.75 V – typically an open sensor ground, a signal shorted to 5 V or battery voltage, or an open signal wire on a pulled-up input. Both detect it within about a second and switch the warning light on in the first trip. The module carries on with sensor A, limits throttle opening and power and switches off cruise control.

Likely causes

Sensor ground open
Sensor B or throttle body faulty
Signal shorted to 5 V or 12 V in the harness
Engine module faulty

Symptoms

  • Check engine light and throttle warning light
  • Reduced power, limp mode
  • Poor throttle response, jerking
  • Cruise control disabled

Repair estimate

DifficultyMediumDIY possible
Parts and labour€80–600
Time0.5–2 h

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

Parts involved

throttle position sensor belectronic throttle bodysensor wiring

Related codes

P0123P0220P0221P0222P2135

References: law.cornell.edu, gsi.ext.gm.com, newtonnet.co.uk.