P2AC7

Charge Air Cooler Coolant Temperature Sensor B Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine operation
Errors in the cooling system

Causes

Intercooler coolant temperature sensor fault B
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Corroded contacts or damaged wiring
Engine control unit malfunction

How to Fix

Check the integrity of the sensor circuit
Inspect the connector and contacts for damage
Check sensor resistance at different temperatures
Replace the coolant temperature sensor if necessary
Reset the error code and check if it returns

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