Charge Air Cooler Bypass Position Sensor Circuit Low
The P024E code indicates that the Engine Control Module (ECM) has detected a low voltage signal from the charge air cooler bypass position sensor. This sensor monitors the position of the bypass valve in the charge air cooler system, which regulates airflow to optimize engine performance and emissions. A low circuit condition typically means the sensor signal is below the expected range, often due to a short to ground, open circuit, or faulty sensor. This can affect boost pressure control and engine performance.
01. Most Common Causes
- Faulty charge air cooler bypass position sensor
- Short to ground in sensor circuit
- Open circuit in sensor signal or reference wire
- Damaged connector or wiring harness
- Failed ECM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or performance
- Poor fuel economy
- Possible boost pressure issues
- Engine may enter limp mode
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data.
Step 2: Visually inspect the sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test sensor voltage reference (typically 5V) and ground at the connector.
Step 4: Measure sensor signal voltage while operating the bypass valve manually (should vary smoothly).
Step 5: If signal is low or stuck, disconnect sensor and check for short to ground in wiring.
Step 6: Replace sensor if tests indicate internal failure; repair wiring as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause reduced performance and potential boost control issues. Limp mode may activate, limiting speed. Have it diagnosed promptly.
How much does it cost to fix?▼
Typical repair costs range from $50 to $150 for sensor replacement, plus diagnostic fees. Wiring repairs may add $50-$100.