P0403
EGR A Control Circuit/Open
P0403 is an OBD-II diagnostic trouble code meaning: EGR A Control Circuit/Open. Common causes: open or damaged egr control circuit wiring harness, egr solenoid malfunction. Estimated repair cost: $33–167.
Symptoms
- Unstable engine idling
- Power Loss
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Open or damaged EGR control circuit wiring harness
- EGR solenoid malfunction
- Problems with the EGR valve (stuck, dirty)
- Engine control unit (ECU) malfunction
How to Fix
- Check the EGR control circuit wiring harness for breaks or damage.
- Check the resistance of the EGR solenoid (compare with normalized values)
- Clean or replace EGR valve if necessary
- Check power supply and control signals from ECU
Related codes
Error P0403 by Vehicle Brand
FAQ
What does the P0403 code mean?
P0403 is an OBD-II diagnostic trouble code that indicates: EGR A Control Circuit/Open
What causes a P0403 error code?
The most common causes of P0403 include: Open or damaged EGR control circuit wiring harness; EGR solenoid malfunction; Problems with the EGR valve (stuck, dirty); Engine control unit (ECU) malfunction.
How do I fix a P0403 diagnostic trouble code?
To fix P0403: Check the EGR control circuit wiring harness for breaks or damage.. Check the resistance of the EGR solenoid (compare with normalized values). Clean or replace EGR valve if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0403?
Limited driving only, diagnose soon
How much does it cost to fix P0403?
The estimated repair cost for P0403 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat