Charge Air Cooler Temperature Sensor Circuit Low Bank 1
The P007C code indicates that the Engine Control Module (ECM) has detected a voltage signal from the charge air cooler temperature sensor that is lower than the expected range. This sensor monitors the temperature of the air entering the engine after the intercooler. A low circuit condition typically means the sensor is reading an abnormally low temperature or the signal voltage is too low, often due to a short to ground, faulty sensor, or wiring issues. This can affect air-fuel mixture calculations and engine performance.
1. Most Common Causes
- Faulty charge air cooler temperature sensor
- Short to ground in sensor circuit
- Open or shorted wiring or connector issues
- Corrosion or damage at sensor connector
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or performance
- Poor fuel economy
- Possible hesitation or rough idle
3. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data to confirm P007C.
Step 2: Visually inspect the charge air cooler temperature sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Using a multimeter, check sensor resistance at various temperatures and compare to manufacturer specifications.
Step 4: Test the sensor signal voltage at the ECM connector; if low, isolate the circuit for shorts or opens.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances with this code, as it can cause reduced engine performance and potential drivability issues. However, short trips to a repair shop are usually acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, depending on labor rates and parts pricing.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.