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Check P0401 Fault Code

When you check engine light came on code P0401 the reason should be Low EGR flow control is detected. However your vehicle's manufacturer may have a different definition for the P0401 OBD-II Diagnostic Powertrain (P) Trouble Code. So you should chech it on our car models.

P0401 Code Reason

Parts or components should not be replaced with reference to only a P0401 DTC. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing.

P0401 Possible Fix :

Check your choke plate. Is it positioned correctly? Is it still working as it should? Does it open completely? If not, then you either replace it or repair it. If the damage is quite severe, I suggest you put down your repair tools and start looking around for a replacement choke plate to avoid a repeat of this nasty episode.

P0401 OBD-II Diagnostic Powertrain (P) Trouble Code Description

P0401 OBD-II Trouble Code Early Exhaust Gas Recirculation (EGR) systems component s include and EGR Valve, and Engine Control Μodule (ECΜ) Controlled Vacuum Switch Valve or EGR Solenoid and an EGR Vacuum Μodulator. Dependin

Reason For P0401 Code

The reason of P0401 OBD-II Fault Code Check is P0401 Exhaust Gas Recirculation Flow Insufficient Detected.

P0401 Solution:

Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. Spark plugs typically need to be replaced every season or 25 hours of use. You should also check that the spark plug gap is set properly. If your spark plugs look good, problems with your ignition system can also preventing a spark. These can range from a faulty spark plug lead, shorted kill switch or flywheel key damage.

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