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.
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.
Common causes
- high
Connector loose or corroded
One of the most commonly reported causes for this code — check this first.
Typical part cost: $40-330
- low
Connector with intermittent contact under vibration
Less common, but worth ruling out after the more likely causes.
Typical part cost: $40-330
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P00A4.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for P00A4.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for P00A4.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does P00A4 mean?
P00A4 means "Charge Air Cooler Temperature Sensor Circuit Intermittent/Erratic Bank 2". It is a generic OBD-II code that points to a fault in the fuel & air metering / auxiliary emission controls.
What are the most common causes of P00A4?
connector loose or corroded; connector with intermittent contact under vibration; harness routed against vibrating component — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full P00A4 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.