P007B code meaning
Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 1
Powertrain system Generic code P00xx codes Check engine light
What P007B means
The charge air cooler temperature sensor (an NTC thermistor) measures the temperature of the compressed charge air at the charge air cooler, depending on the manufacturer upstream or downstream of it, and is often combined with the boost pressure sensor. The engine control module uses it for the air mass calculation, boost control, component protection and to monitor cooler efficiency. P007B is a plausibility check: at a start after a long standstill the sensor is compared with other temperature sensors such as intake air or coolant, which should then agree. Some systems also check while driving whether the reading stays implausibly high.
P007B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyEasy, DIY possible
- Typical labor0.3 to 1 hours
- Clears after repairAfter a drive cycle
Symptoms of P007B
- Check engine light on
- Reduced power possible, especially on diesels
- Often no noticeable symptoms
Common causes of P007B
- Most likelySensor drifting or oil-coated and slow to respond
- PossibleWrong sensor fitted
- PossibleComparison sensor faulty
- Less likelyCharge air cooler efficiency or airflow impaired
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Charge air cooler temperature sensorCharge air cooler temperature sensor wiringBoost pressure sensor
What each part of P007B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 7B | The exact fault in that area. |
What to do next
- Note P007B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P007B
What does P007B mean?
P007B means "Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 1". The charge air cooler temperature sensor (an NTC thermistor) measures the temperature of the compressed charge air at the charge air cooler, depending on the manufacturer upstream or downstream of it, and is often combined with the boost pressure sensor. It is a generic code, so it means the same on every make.
Is it safe to drive with P007B?
Drive gently and only to a workshop. With P007B the car can go into limp mode (reduced power) to protect itself.
Will P007B fail an emissions test?
Yes, it can. P007B is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P007B to fix?
Difficulty: easy. A typical repair takes 0.3 to 1 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P007B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.