P2AA5

EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine operation at idle
Possible misfires

Causes

EGR cooler bypass solenoid valve malfunction
Open or short circuit in wiring harness
Control circuit connector problems
Engine control unit (ECU) malfunction
Mechanical jamming of the bypass valve

How to Fix

Check the condition of the wiring harness and connectors
Test EGR cooler bypass solenoid valve
Check control circuit resistance
Clean or replace bypass valve if necessary
If necessary, replace the engine control unit

Related codes

P2AA6 P2AA4 P0401