What it means
The control module detects a range or performance fault in the Bank 1 charge air cooler temperature sensor circuit.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The bank 1 charge air cooler temperature sensor reports the temperature of compressed intake air after the cooler. P007B sets when the signal is electrically present but falls outside the expected range or response pattern, which can happen if the sensor has drifted or is poorly mounted.
Common causes
Most likely first.
- Sensor reading drifted
- Sensor element aged beyond calibration window
- Sensor mounting loose - signal damping
Symptoms
- Check engine light on
- Reduced engine performance or boost
- Poor fuel economy
How to diagnose it
- Record freeze-frame data and compare the bank 1 charge air cooler temperature reading with ambient and other intake-temperature readings when conditions should be similar.
- Inspect the sensor mounting and connector for looseness, corrosion, or damage that could delay or distort the temperature signal.
- Review live temperature data from a cold start through warm-up and look for a reading that changes implausibly slowly or disagrees with related sensors.
- Check sensor wiring and connections for excessive resistance or intermittent contact using the manufacturer's procedure.
- Test the bank 1 sensor response against the manufacturer's specification and replace it if it drifts outside the specified range.
Common fixes
- Secure the bank 1 sensor in its correct mounting position.
- Repair poor connector contact or damaged sensor wiring.
- Replace the bank 1 charge air cooler temperature sensor if its response is out of range.
- Clear the code and confirm the temperature reading responds plausibly after repair.
Can I keep driving?
Reduced boost or engine performance may occur, so avoid towing or hard acceleration while the reading is unreliable. Continued operation with poor performance can worsen fuel economy and make passing less predictable.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.