P2CB4

Charge Air Cooler Coolant Pump B Supply Voltage Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Reduced engine power
Check Engine Light Illuminates
Charge air overheating
Unstable engine operation under load

Causes

Intercooler coolant pump malfunction
Open or short circuit in the power supply
Relay or fuse problems
Engine control unit malfunction
Corroded contacts or damaged wiring

How to Fix

Check the pump circuit fuses and relays
Inspect the wiring harness for damage
Check the functionality of the coolant pump
Scan the control unit for additional errors
Check contacts and connections in the power supply circuit

Related codes

P2CB3 P2CB5 P2CB6