How do I fix code po401?

How do I fix code po401?

What repairs can fix the P0401 code?

  1. Replacing the leaking or clogged EGR valve.
  2. Replacing a broken vacuum line to the EGR valve or control solenoid.
  3. Replacing an EGR temperature sensor or clean the carbon off of it to repair it if it does not register enough of a temperature change.

What does po401 mean?

Diagnostic trouble code (DTC) P0401 stands for “Exhaust Gas Recirculation (EGR) Flow Insufficient Detected.” This code means that the computer detects insufficient exhaust gas recirculation (EGR) flow in the system.

What are the symptoms of a bad EGR temperature sensor?

Symptoms of a Bad or Failing EGR Temperature Sensor

  • Engine ping or knock. One of the first symptoms commonly associated with a bad or failing EGR temperature sensor is engine ping or knock.
  • Check Engine Light comes on.
  • Failed emissions test.

What causes low EGR flow?

Restricted or clogged EGR tubes. A clogged catalytic converter. Carbon buildup on the EGR temperature sensor. Faulty or lack of vacuum supply to the EGR.

What could cause the code p0401?

Code P0401 is triggered when the EGR temperature sensor does not see enough of a temperature change when the EGR is commanded to open. These sensors tend to get a lot of carbon buildup that causes them to lose sensitivity to the heat from the EGR gases.

What is OBD code p0401?

P0401 is a common OBDII trouble code that’ll pop up in the Ford Explorer. It has to do with the emissions system and stands for: P0401: EGR → Insufficient Flow.

What does code p0402 mean?

What the P0402 code means. P0402 is an OBD-II generic code that the engine control module (ECM) has detected indicating the engine exhaust gas recirculation ( EGR ) valve is flowing too much recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold.

What does p0404 OBD code mean?

OBD-II Code P0404 is defined as a Exhaust Gas Recirculation Circuit Range/Performance NOx gases, which cause acid rain and respiratory problems, are formed when the engine’s combustion temperature is too high (2500° F). EGR systems are used to reduce the combustion temperature, thus reducing NOx formation. Aug 12 2019