Throttle/Pedal Position Sensor C Circuit Intermittent
Code P0229 indicates an intermittent fault in the throttle/pedal position sensor 'C' circuit. This sensor is part of the electronic throttle control system and provides input to the PCM about accelerator pedal position. An intermittent signal can cause erratic throttle response, hesitation, or sudden loss of power. The issue may stem from a loose connection, damaged wiring, or a failing sensor.
01. Most Common Causes
- Faulty throttle/pedal position sensor C
- Damaged or corroded wiring/connectors
- Intermittent short or open in the circuit
- Poor electrical connection at PCM
02. Symptoms You Will Notice
- Check Engine Light on
- Intermittent loss of throttle response
- Engine hesitation or surging
- Reduced power or limp mode
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage or corrosion.
Step 3: Test sensor C voltage and resistance with a multimeter while wiggling harness to reproduce intermittent fault.
Step 4: Compare readings to manufacturer specifications; replace sensor if out of range.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as intermittent throttle issues can cause sudden loss of power, increasing accident risk.
How much does it cost to fix?▼
Typically $50-$150 for DIY sensor replacement; labor at a shop may add $100-$200.