What causes a p0403 code on an EGR harness?
The causes for a P0403 EGR code could be any of the following: Excessive resistance in control circuit (PCM controlled ground) due to an open, chafing or damage to the harness Poor connection at the EGR solenoid harness (worn or loose pins) Water intrusion at the EGR solenoid harness
When do you get a p0403 code?
Code P0403 is triggered when the EGR vacuum control solenoid is not making a complete and correct circuit to the ECM. When this happens, the ECM will turn off its control of the solenoid. Need help with a P0403 code? YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle.
When does EGR turn off vacuum control solenoid?
Code P0403 is triggered when the EGR vacuum control solenoid is not making a complete and correct circuit to the ECM. When this happens, the ECM will turn off its control of the solenoid.
When to use DTC p0403 check engine light?
It receives 12-volt power from the powertrain control module when operating conditions — engine running and battery voltage above 12 volts — are met. If the EGR solenoid circuit is not in the expected state when commanded by the PCM, DTC P0403 is set in the PCM and the Check Engine light is illuminated.
The causes for a P0403 EGR code could be any of the following: Excessive resistance in control circuit (PCM controlled ground) due to an open, chafing or damage to the harness Poor connection at the EGR solenoid harness (worn or loose pins) Water intrusion at the EGR solenoid harness
What to do if your car has a p0403 fault code?
The steps to follow for the correct repair of the P0403 diagnostic code are: With the key in the ignition position and the engine off, using an automotive scanner, activates the EGR valve control solenoid. Pay attention and if you hear a sound similar to a click, it indicates the solenoid is running.
Code P0403 is triggered when the EGR vacuum control solenoid is not making a complete and correct circuit to the ECM. When this happens, the ECM will turn off its control of the solenoid.
What causes a fault in the EGR control circuit?
Usually a fault in the control circuit, will leave no noticeable symptoms other than the Malfunction Indicator Lamp (MIL) illumination. However, if the EGR control solenoid is stuck open due to debris, etc. the code may be accompanied by misfire under acceleration, rough idle, or engine dying altogether.