What is an EGR code?
What is an EGR code?
EGR stands for “exhaust gas recirculation”. This OBD code basically means that the cars computer has tried to open the EGR valve, but it cannot get enough exhaust gas into the engine. EGR systems used to be controlled by engine vacuum via hoses and valves. Now most of them are controlled by electrical solenoids.
What to do if your engine has a p0401 code?
Your mechanic will also want to make sure that your EGR valve is receiving enough engine vacuum, particularly when the control solenoid opens on light-to-medium acceleration. Finally, your mechanic will remove your EGR temperature sensor and valve to check if there’s any carbon build-up or blockage of the EGR tubes.
What causes a computer to flag a p0401 code?
The computer will flag your P0401 code in the computer when it recognizes that there is not enough exhaust gas going back through the intake chamber… or simply, a low flow which causes the computer to flag the P0401 code. How does your computer know how much exhaust gas is being burned if any? Different manufacturers do it differently.
What does p0401 EGR system insufficient flow detected mean?
So you have changed the EGR valve and this p0401 code continues to pop up on the computer. You are frustrated and ready to drive your car off of a cliff. What does this P0401 diagnostic trouble code mean anyway? The correct definition for this diagnostic trouble code P0401 is “ Insufficient EGR Flow Detected “.
Your mechanic will also want to make sure that your EGR valve is receiving enough engine vacuum, particularly when the control solenoid opens on light-to-medium acceleration. Finally, your mechanic will remove your EGR temperature sensor and valve to check if there’s any carbon build-up or blockage of the EGR tubes.
So you have changed the EGR valve and this p0401 code continues to pop up on the computer. You are frustrated and ready to drive your car off of a cliff. What does this P0401 diagnostic trouble code mean anyway? The correct definition for this diagnostic trouble code P0401 is “ Insufficient EGR Flow Detected “.
The computer will flag your P0401 code in the computer when it recognizes that there is not enough exhaust gas going back through the intake chamber… or simply, a low flow which causes the computer to flag the P0401 code. How does your computer know how much exhaust gas is being burned if any? Different manufacturers do it differently.
What to do when your engine code pops up?
Here are the key steps to fixing a p0401 code when it pops up: Clean the EGR Valve (if necessary) Make the Electrical/Vacuum Repair (if necessary) Replace/Reinstall EGR Valve/Hoses and Gaskets
