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 and engine performance.
01. Most Common Causes
- Faulty charge air cooler temperature sensor
- Short to ground in sensor circuit
- Open or damaged wiring/connector
- Corroded or loose electrical connections
- ECM software or hardware issue (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power or performance
- Poor fuel economy
- Rough idle or hesitation
- Possible black smoke from exhaust
03. Step-by-Step Diagnosis
Step 1: Use OBD2 scanner to confirm code and check for related codes.
Step 2: Visually inspect the sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test sensor resistance and compare to manufacturer specifications.
Step 4: Check voltage at sensor connector with key on; should be around 5V reference.
Step 5: If sensor and wiring are good, test ECM output and consider reprogramming or replacement.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally not recommended to drive long distances as it can cause reduced performance and potential engine damage. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a sensor replacement, plus diagnostic fees. Labor may add $50-$100.