P2491
EGR Cooler Bypass Control Circuit High Bank 2
P2491 is an OBD-II diagnostic trouble code meaning: EGR Cooler Bypass Control Circuit High Bank 2. Common causes: short circuit to power in the control circuit, egr bypass solenoid valve malfunction. Estimated repair cost: $17–89.
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
Error P2491 by Vehicle Brand
FAQ
What does the P2491 code mean?
P2491 is an OBD-II diagnostic trouble code that indicates: EGR Cooler Bypass Control Circuit High Bank 2
What causes a P2491 error code?
The most common causes of P2491 include: Short circuit to power in the control circuit; EGR bypass solenoid valve malfunction; Broken or damaged wiring harness; Connector problems or contact corrosion.
How do I fix a P2491 diagnostic trouble code?
To fix P2491: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2491?
Yes, but get it checked soon
How much does it cost to fix P2491?
The estimated repair cost for P2491 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat