Throttle/Pedal Position Sensor B Circuit High Input
Fix P0223 throttle/pedal position sensor B code. Learn about dual TPS circuits and how to diagnose a high signal.
Sensors & Electronics
Symptoms
- 1Check engine light on
- 2Reduced power or limp mode
- 3Hesitation or surging
- 4Unresponsive throttle
- 5Erratic idle
Common Causes
- 1Faulty accelerator pedal or throttle sensor
- 2Short to voltage in the wiring
- 3Damaged connector or corrosion
- 4Bad ground or reference voltage
- 5ECM fault (rare)
How to Fix
- 1Inspect sensor wiring for shorts to voltage
- 2Check the connector for damage and corrosion
- 3Verify reference voltage and ground
- 4Test both sensor channels through their range
- 5Replace the pedal or throttle sensor if faulty
What Does P0223 Mean?
The P0223 code indicates that the "B" throttle or accelerator pedal position sensor circuit is reading higher than expected. Electronic throttle systems use redundant sensors for safety, and B is the second channel.Why There Are Two Sensors
Drive-by-wire systems use two position signals that track each other. If one disagrees or reads out of range, the ECM sets a code and often enters reduced-power mode.Common Causes
A faulty pedal or throttle sensor, wiring shorts, or connector problems are typical. A short to voltage will push the signal high.How AI4Car Helps
AI4Car can show both throttle/pedal sensor signals, helping you confirm whether channel B is tracking correctly with channel A.Related Codes
P0220P0222P0123P2135
Diagnose with AI4Car
Get personalized diagnostics for your specific vehicle. Our AI analyzes your car's data in real-time to provide accurate recommendations.