The P0406 code is the result of the exhaust gas circulation (EGR) sensor A having a high circuit voltage. This code is set when the ECM identifies the EGR voltage is higher than the specified range, thus triggering the check engine light to illuminate on the vehicle dashboard.
How do I fix error code P0406?
What repairs can fix the P0406 code?
- Replacing the EGR valve.
- Repairing or replacing wiring harness as needed.
- Repairing poor electrical connections.
- Replacing the vacuum line.
- Cleaning excessive carbon buildup.
How much does it cost to fix a P0406?
around $75.00
With a P0406, more than likely the problem is with the EGR sensor component rather than the solenoid inside the EGR valve. On average this component (aftermarket) runs around $75.00. Replacing it will usually take around 1.5 hours of labor; not including diagnostics time.
What causes exhaust gas recirculation sensor A circuit high?
Here are the possible reasons why the sensor is sending too high voltage signals to the PCM: Faulty EGR valve position sensor. Bad EGR valve. Circuit issues, such as damaged wires or poor connections.
Where is the exhaust gas recirculation sensor?
The EGR temperature sensor is usually mounted in the exhaust manifold or mounted near the EGR valve.
What does P0405 code mean?
P0405 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation (EGR) sensor has went below its specification range. A short to ground of the sensor input to the ECM.
What is the code P0403?
P0403 is an OBD-II generic code that indicates that the engine control module (ECM) has detected the engine exhaust gas recirculation (EGR) circuit has malfunctioned. The ECM detected a short or open circuit in the EGR vacuum control solenoid or wiring to the solenoid.
Can I drive with a P0406 code?
Diagnosis: This trouble code will not prevent your vehicle from normal operation. Code P0406 has a variety of symptoms that could prevent your vehicle from running normally or increase the difficulty of driving. If this code persists, your vehicle should be capable of being driven to the nearest dealership.
How do I fix code P0400?
What repairs can fix the P0400 code?
- Replacing the EGR valve.
- Replacing a broken vacuum line to the EGR valve.
- Replacing an EGR temperature sensor or cleaning the carbon off of it to repair it.
- Cleaning carbon out of EGR tubes to intake manifold.