Do you need to check your EGR valve?
The EGR system is, for the most part, in the “out of sight, out of mind” category, and typical doesn’t require regular maintenance. But if it gets clogged with carbon deposits, you’ll see your “check engine” light come on, and a code (perhaps P0401 or P0402 or P0403) will show that there is insufficient flow.
What does EGR stand for in an engine?
EGR Explained: Exhaust Gas Recirculation. The EGR Valve and System – it’s just three letters, but EGR can result in AGGravation. Common in automobile emission systems since the early 1970s, the EGR (Exhaust Gas Recirculation) valve controls an engine’s emission of smog-causing nitrous oxides, or NOx.
Why does the fuel management light stay on when the EGR is open?
This means the amount of hydrocarbon gases emitted from the tailpipe increases significantly producing a fuel smell. Your engine management light may stay on once your car detects an issue with the EGR valve. This could be caused when the EGR is either constantly closed or open.
Why is EGR not needed at engine idle?
This feature reduces or eliminate engine ping caused by early detonation. This function is not needed at engine idle or when the vehicle is cold. This is why the EGR system is quite complicated and receives many inputs from other sensors that facilitate its operation.
What are the results of the GM EGR valve test?
Check engine light (CEL) will be shining nice and bright. P0401 EGR System Flow Insufficient. P0403 EGR Solenoid Control Circuit. P0404 EGR Open Position Performance. P0405 EGR Position Sensor Circuit Low Voltage. Rough idle. Really bad gas mileage.
Why is there an EGR code on my Ford?
However, we often find EGR codes on Ford products caused by inexpensive plastic parts that falsely report position to the control module. Several technical service bulletins for a wide variety of different makes and models have documented different problems associated with the EGR valve system.
What should I do if my EGR light is not working?
The repair of this condition is removal of the EGR valve and inspection of the passageway to check for a blockage. Each model vehicle has different procedures for clearing the passageway due to many different configurations of the system. Some Fords have a removable tube.
What is the Check Engine Light ( CEL ) for?
Check engine light (CEL) will be shining nice and bright. P0401 EGR System Flow Insufficient. P0403 EGR Solenoid Control Circuit. P0404 EGR Open Position Performance. P0405 EGR Position Sensor Circuit Low Voltage. Rough idle.