Throttle/Pedal Position Sensor/Switch "C" Circuit Intermittent
The P0229 code means the vehicle's onboard diagnostic system has detected: Throttle/Pedal Position Sensor/Switch "C" Circuit Intermittent. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $500 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Affiliate links — we earn a commission at no extra cost to you.
What Are the Symptoms of P0229?
- Check Engine Light on
- Intermittent hesitation, surging or loss of power
- Reduced power mode that comes and goes
- Symptoms that change with bumps or engine movement
What Causes P0229? (Most Likely First)
- Loose or corroded connector at the sensor High
- Chafed wiring that opens or shorts with movement or vibration High
- Worn sensor with dead spots in its range Moderate
- Shared reference voltage or ground problem Low
Can I Still Drive with P0229?
Short distances only. P0229 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0229 mean?
P0229 means Throttle/Pedal Position Sensor/Switch "C" Circuit Intermittent. The signal from sensor "C" is dropping out or jumping intermittently.
Why does my vehicle have more than one throttle or pedal sensor?
Electronic throttle systems use more than one position signal so the engine computer can cross-check them. If one disagrees or drops out, it can limit power as a safety measure.
Can I drive with P0229?
Short distances, carefully. The vehicle may drop into reduced power mode without warning, so have it repaired promptly.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0229?
-
Find which part carries sensor "C" on your vehicle. "Throttle/Pedal" means it may be in the throttle body or in the accelerator pedal assembly, depending on the design.
-
Inspect the connector and harness for corrosion, loose pins or chafing.
-
Graph sensor "C" on a scan tool while slowly sweeping the throttle or pedal and gently wiggling the harness. Look for dropouts or spikes.
-
Check the sensor's reference voltage and ground, which are often shared with other sensors.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.