P2490

EGR Cooler Bypass Control Circuit Low Bank 2

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 at idle
Dips during acceleration

Causes

Open or short circuit in control circuit wiring harness
EGR cooler bypass solenoid valve malfunction
Poor contact in control circuit connectors
Problems with the engine control unit (ECU)
Mechanical damage to EGR system components

How to Fix

Check the integrity of the control circuit wiring harness
Check the resistance and operation of the bypass solenoid valve
Clean the connector contacts and check the quality of connections
Check control circuit voltage
If necessary, replace the solenoid valve or repair the wiring harness

Related codes

P2489 P2491 P0401