How to fix code p0401 acura cl?

code p0401 Exhaust gas recirculation flow insufficient detected.


vehicle: 1997 acura cl 2.2|||Pretty obvious there's either lots of dirt or some other flow restriction, so a good cleaning is in order.


Take the EGR valve apart and clean or if not familiar with it, the job is not too expensive to have done.|||Clean up the inside of the EGR valve and don't forget to clean the ports in the intake manifold that the EGR connects to. Sometime, well most times, you have to chip out the carbon build with a screwdriver and hammere. Make sure you check the functioning of the valve by putting a vacuum on it.|||First step is take out the exhaust gas recirculation valve and have a look,they're usually coked up with crud,sometimes they'll clean up,lot of times not.|||Replace your EGR Valve and then disconnect the battery, step on the brakes to bleed off all the power, then reconnect the battery. Start the car, drive around to make sure the CEL doesn't come on.