OBD-II code · Powertrain (generic)
P00A4 Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2
Intermittent dropouts or noise on the charge air cooler temperature sensor signal on bank 2. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P00A4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyConnector loose or corroded
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Cac Temperature Sensor, Sensor Wiring
Related codes
- P007ECharge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 1
- P00A1Charge Air Cooler Temperature Sensor Circuit Range/Performance Bank 2
- P00A2Charge Air Cooler Temperature Sensor Circuit Low Bank 2
- P00A3Charge Air Cooler Temperature Sensor Circuit High Bank 2
- P00A5Intake Air Temperature Sensor 2 Circuit Bank 2
- P00A6Intake Air Temperature Sensor 2 Circuit Range/Performance Bank 2
- P00A7Intake Air Temperature Sensor 2 Circuit Low Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.