P2ACA

Charge Air Cooler Coolant Temperature Sensor B Circuit High

Moderate severity

Voltage on the charge air cooler coolant temperature B sensor signal line is above the expected window. Wire shorted to B+ or sensor open.

Common causes

Signal wire shorted to B+
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $60-280
Open sensor
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $60-280
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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.

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Related codes

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Frequently asked questions

What does P2ACA mean?

P2ACA means "Charge Air Cooler Coolant Temperature Sensor B Circuit High". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2ACA?

signal wire shorted to b+; open sensor; connector pins corroded - high contact resistance — 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.

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