P2491

EGR Cooler Bypass Control Circuit High Bank 2

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Poor engine performance at idle
Increased fuel consumption
Reduced engine power
Unstable engine operation

Causes

Short circuit to power in the control circuit
EGR bypass solenoid valve malfunction
Broken or damaged wiring harness
Connector problems or contact corrosion
Engine control unit (ECU) malfunction

How to Fix

Check the integrity of the wiring harness and connectors
Check the resistance of the EGR bypass solenoid valve
Check for short circuit to power in the circuit
If necessary, replace the solenoid valve
Check and, if necessary, replace the engine control unit

Related codes

P2490 P2492 P0401