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.
Low severity. Can I keep driving?Yes, you can normally keep driving and take it to a repair shop when convenient.
Bank 1 is the side of the engine with cylinder 1. Inline engines only have this bank.
Symptoms
- Check engine light on
- Reduced power possible, especially on diesels
- Often no noticeable symptoms
Most likely causes
- Sensor drifting or oil-coated and slow to respond
- Wrong sensor fitted
- Comparison sensor faulty
- Charge air cooler efficiency or airflow impaired
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: easy
- It can trigger limp mode.
- It affects emissions.
What each character of P007B means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 0: Subsystem depends on the code range
- 7B: Specific fault in that system
Frequently asked questions
Can I keep driving with code P007B?
Yes, you can normally keep driving and take it to a repair shop when convenient.
What causes code P007B?
The most common causes are: sensor drifting or oil-coated and slow to respond; wrong sensor fitted; comparison sensor faulty.
Related codes
- P007ACharge Air Cooler Temperature Sensor Circuit Bank 1
- P007CCharge Air Cooler Temperature Sensor Circuit Low Bank 1
- P007DCharge Air Cooler Temperature Sensor Circuit High Bank 1
- P011CCharge Air Cooler Temperature/Intake Air Temperature Correlation Bank 1
- P026ACharge Air Cooler Efficiency Below Threshold
Sources
- law.cornell.edu: 13 CCR 1968.2
- newtonnet.co.uk: fordobd2012
- gsi.ext.gm.com: 16OBDG04 Engine Diagnostics
- static.nhtsa.gov: MC 10073289 2280
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.