P0223
Throttle/Pedal Position Sensor B Circuit High Input
The computer is seeing the B throttle or pedal sensor circuit read too high. That can make the PCM distrust throttle position and force reduced power operation.
- SEV
- 4/5
- DRIVE
- CAUTION
- DIY
- $20-$250
- SHOP
- $150-$700
Quick answer
AI-CITATION READYWhat it means
Can you drive with it?
Most common causes
- Faulty throttle position sensor B or pedal sensor B
- Signal wire shorted to voltage or damaged wiring in circuit B
- Poor sensor ground causing an artificially high reading
Typical repair cost
DIY usually runs $20-$250. Typical shop repair lands around $150-$700, depending on the root cause.
01 / Definition
P0223 means the PCM detected voltage in throttle or pedal position sensor circuit B that is above the expected range. This can happen because of a short to voltage, failed sensor, poor ground, harness damage, or an internal fault in the throttle body, pedal assembly, or PCM.
02 / Drive status
With caution. The vehicle may suddenly limit throttle response or enter limp mode. Avoid normal driving until the high-input sensor circuit is checked so unintended throttle behavior is ruled out.
03 / Symptoms
- Check engine light
- Reduced power mode
- Erratic throttle response
- High idle or unstable idle
- Limp mode
04 / Causes
| 1 | Faulty throttle position sensor B or pedal sensor B | high |
|---|---|---|
| 2 | Signal wire shorted to voltage or damaged wiring in circuit B | high |
| 3 | Poor sensor ground causing an artificially high reading | medium |
| 4 | Throttle body, pedal assembly, or PCM fault | medium |
05 / Diagnostic sequence
- 01Confirm P0223 and note the operating conditions when it set.
- 02Check for companion throttle, pedal, and correlation codes.
- 03Inspect the sensor B signal wire and connectors for damage, rub-through, or moisture.
- 04Compare live data from sensor B against sensor A to see if one signal is pegged high or out of correlation.
- 05Verify signal voltage, 5-volt reference, and sensor grounds before replacing major components.
06 / Repairs
| 1 | Repair shorted, pinched, or corroded wiring in throttle/pedal sensor circuit B | $20-$150 |
|---|---|---|
| 2 | Replace the throttle body or pedal assembly if sensor B tests high internally | $100-$500 |
| 3 | Repair PCM or reference circuit faults if voltage remains too high after harness testing | $150-$700 |
07 / Related codes
08 / FAQ
Can a short to voltage cause P0223?
Yes. If the B signal wire is shorted to a power source, the PCM can see a constant high input and set P0223.
Does P0223 always mean the throttle body is bad?
No. Wiring damage and poor grounds are common, so the circuit should be tested before replacing parts.
Can P0223 put the car into limp mode?
Yes. Many vehicles limit throttle control when a throttle or pedal signal is stuck high or out of range.
Can P0223 show up with P2101 or P2111?
Yes. A high B-circuit signal can make the PCM think throttle position is wrong or unsafe, which can stack with throttle performance faults such as P2101 or a stuck-open read like P2111.
09 / Source and method
- DATA BASIS
- OBD-II REFERENCE + OBD2.HELP
- METHOD
- STATIC VALIDATION
- SAFETY
- INFORMATIONAL
This page combines OBD-II diagnostic reference data with OBD2.help generated diagnostic guidance for code meaning, likely causes, and repair direction.
Publishing uses deterministic schema and build validation, plus manual spot checks on representative pages before release.
Safety-critical diagnosis and repairs should be confirmed with a qualified mechanic, especially when the vehicle is misfiring, overheating, or losing power.