The P0229: Throttle/Pedal Position Sensor/Switch C Circuit Intermittent indicates an issue where the signal from the throttle or pedal position sensor C is inconsistent, causing erratic throttle response. This problem can stem from an intermittent connection in the sensor circuit, a faulty sensor, wiring or connector issues, or a malfunction in the Powertrain Control Module (PCM). When this code appears, it means that the vehicle’s computer is receiving an unreliable signal from the sensor, which can negatively impact drivability.
P0229 – Quick Overview
| Meaning | P0229: Throttle/Pedal Position Sensor/Switch C Circuit Intermittent |
| Is it serious? | Yes, this code can cause erratic throttle response, which may lead to unsafe driving conditions. Immediate diagnosis and repair are recommended. |
| Possible causes | – Intermittent connection in the throttle/pedal position sensor C circuit – Faulty throttle/pedal position sensor C – Wiring or connector issues – Faulty PCM |
| How to diagnose? | – Inspect the throttle/pedal position sensor C for intermittent operation. – Check wiring and connectors for loose or corroded contacts. – Perform a wiggle test to identify intermittent faults. – Replace or repair any faulty components. |
P0229 Meaning
The P0229: Throttle/Pedal Position Sensor/Switch C Circuit Intermittent code indicates that the vehicle’s computer is detecting an unreliable or inconsistent signal from the throttle or pedal position sensor C. This issue could be due to a faulty sensor, an intermittent connection in the wiring, or problems with the connectors. When this code is triggered, it means that the sensor is not providing a steady signal, which can result in erratic throttle behavior and affect the vehicle’s drivability.
Step-by-step Diagnostic Guide
Follow this procedure to diagnose and resolve the P0229 code by systematically eliminating potential causes.
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for any additional related codes that might give further insight into the problem. | OBD-II Scanner |
| Inspect Throttle/Pedal Position Sensor C | Examine the sensor for any signs of intermittent operation. Look for issues such as loose connections or internal faults within the sensor itself. | Multimeter, Manufacturer’s Specifications |
| Check Wiring and Connectors | Inspect the wiring and connectors associated with the sensor C for any signs of wear, corrosion, or damage that could lead to intermittent connections. | Flashlight, Multimeter |
| Perform a Wiggle Test | Gently wiggle the wiring and connectors while monitoring the sensor’s signal to identify any intermittent faults caused by loose or damaged connections. | Multimeter, Circuit Tester |
| Inspect the PCM | If the sensor and wiring appear to be functioning correctly, inspect the Powertrain Control Module for any faults or connectivity issues. Reprogram or replace if necessary. | OBD-II Scanner, Multimeter |
| Repair or Replace Faulty Components | Based on the diagnostic results, repair or replace any faulty components such as the throttle/pedal position sensor C, damaged wiring, or faulty connectors. | Replacement Parts, Basic Hand Tools |
| Clear the Code and Test Drive | After repairs, use the OBD-II scanner to clear the P0229 code. Take the vehicle for a test drive to ensure that the issue has been resolved and that the code does not return. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to confirm that the P0229 code has been cleared and does not reappear. If the code returns, further diagnosis may be required. | OBD-II Scanner |
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