P0223: Throttle/Pedal Position Sensor/Switch B Circuit High Input
Can you still drive? Drive with extreme caution. The vehicle may enter limp mode limiting speed. Erratic throttle response is a safety hazard.
What Does P0223 Mean?
Code P0223 indicates that the secondary throttle position sensor (TPS B) or accelerator pedal position sensor is sending a voltage signal that is higher than the expected maximum. Modern vehicles use redundant sensors for safety, and this code means the secondary sensor has an electrical fault while the primary sensor may still be functioning.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty throttle position sensor
- Damaged accelerator pedal position sensor
- Short to voltage in the sensor wiring
- Corroded throttle body connector
- Failed throttle body assembly
Symptoms
- Check engine light on
- Reduced engine power or limp mode
- Erratic or unresponsive throttle
- Engine may idle high
- Vehicle may not accelerate properly
Diagnostic Steps
- 1Read freeze frame data and compare TPS A and TPS B voltages
- 2Monitor TPS B voltage while slowly opening the throttle
- 3Inspect the throttle body connector for corrosion or damage
- 4Check the accelerator pedal position sensor if equipped
- 5Test sensor wiring for shorts to voltage
- 6Replace the throttle body or pedal sensor as indicated
Recommended Parts & Tools
throttle position sensor
throttle body assembly
accelerator pedal position sensor
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $150 - $700 |
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Chat with AI About P0223Commonly Affected Vehicles
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Frequently Asked Questions
Why does my vehicle go into limp mode with P0223?
The ECM enters limp mode as a safety measure when the throttle position sensor signals disagree. This limits engine power to prevent unintended acceleration.
Can I clean the throttle body to fix P0223?
Cleaning the throttle body may help if carbon buildup is causing the sensor to read incorrectly, but P0223 is usually an electrical failure that requires sensor or throttle body replacement.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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