What does the OBD code p0400 stand for?
P0400 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation (EGR) valve is not flowing recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold.
Why do I get a P0420 code on my envoy?
There are many things that can cause the P0420 trouble code in your Envoy. Here are the most common ones. Oxygen Sensor – The P0420 codes is thrown when the oxygen sensors on both sides of the exhaust have very similar readings. When the oxygen sensor is bad, it can cause a false reading and trigger the code.
What does the OBD code mean on a GMC Envoy?
P0420 is a OBDII trouble code. The code technically stands for: Your Envoy has at least two oxygen sensors, one before and after the catalytic converter. Among the many jobs that oxygen sensors have is they have to measure the emissions levels coming in and out of the converter.
What does a code p0400 on an EGR mean?
A code P0400 may mean that one or more of the following has happened: Plugged EGR passage which restricts the flow of exhaust gasses Faulty EGR solenoid wiring/harness
P0400 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation (EGR) valve is not flowing recirculated exhaust gases when it is commanded to open the flow of gases into the intake manifold.
There are many things that can cause the P0420 trouble code in your Envoy. Here are the most common ones. Oxygen Sensor – The P0420 codes is thrown when the oxygen sensors on both sides of the exhaust have very similar readings. When the oxygen sensor is bad, it can cause a false reading and trigger the code.
P0420 is a OBDII trouble code. The code technically stands for: Your Envoy has at least two oxygen sensors, one before and after the catalytic converter. Among the many jobs that oxygen sensors have is they have to measure the emissions levels coming in and out of the converter.
What kind of trouble code is p0402?
The check engine light on my 2000 Ford Taurus 24 Valve DOHC V6 came on and after scanning with an OBD2 Scan Tool, I received an P0402 (excessive EGR flow). I replaced the DPFE sensor and , since the car was ‘missing’, I also replaced the spark plugs (the car has 40K miles).