How do I fix code P0404?
What repairs can fix the P0404 code?
- Replacing the EGR valve if it stuck partly open from carbon buildup in the pintle area and cannot be cleaned.
- Replacing the EGR position sensor if it is determined that it cannot give a correct input reading to the ECM when moved manually.
What does P0404 code mean?
When P0404 is triggered, it means that the PCM has been told that the valve is performing in a way that is outside of its specified parameters. More specifically, the PCM has been told that the valve is closed when it should be open, or vice-versa.
What does EGR mean on a code reader?
exhaust gas recirculation
Code P0401 Meaning The exhaust gas recirculation (EGR) recirculates small amounts of exhaust back into the combustion chambers of the engine in order to decrease the combustion temperature, thereby reducing the formation of smog-producing nitrogen oxides.
How can I test my EGR valve without a vacuum pump?
So one way to check the EGR solenoid is to simply disconnect the vacuum line at the EGR valve and plug it with golf tee or something. Let the engine warm up to operating temp, then start driving around GENTLY. Once you hit speeds of over 25 mph, you should see the SES light illuminate. It should be code 32.
How can I tell if my EGR valve is bad?
What are the symptoms of a failing EGR valve?
- Your engine has a rough idle.
- Your car has poor performance.
- You have increased fuel consumption.
- Your car frequently stalls when idling.
- You can smell fuel.
- Your engine management light stays on.
- Your car produces more emissions.
- You hear knocking noises coming from the engine.
What does EGR position sensor do?
The EGR Position sensor detects the movement and position of the EGR valve pintle. The EGR Pressure sensor detects exhaust gas flow through the EGR passage. Sensors pass meticulous quality control to assure accurate voltage output.
What results from too little EGR flow?
This is the process we know as EGR, or exhaust gas recirculation. Added prematurely and EGR will cause a rough idle and misfire. Too little flow when needed will result in high NOx emissions and engine ping, or spark knock. Exhaust gasses can be added to the combustion chamber in two ways.
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
What does the OBD fault code p0404 mean?
P0404 is a generic OBD II fault code that indicates that there is an issue with the Exhaust Gas Recirculation (EGR) circuit. The Engine Control Module (ECM) has detected that the EGR circuit is either out of range or not functioning properly. The purpose of the EGR system is to burn fuel more efficiently.
What does the DTC code p0400 stand for?
What Does the P0400 Code Mean? Diagnostic trouble code (DTC) P0400 code stands for “Exhaust Gas Recirculation (EGR) Flow Malfunction.” It is triggered when the flow of exhaust gas recirculation is lower than what the powertrain control module (PCM) expects.
Is the p0404 valve on my Malibu gone?
I have a 2002 Chevy Malibu LS with the 3.1L V6 engine. I had a p0404 code and when I did my tune-up recently, I went ahead and replaced the EGR valve. However, after two days of normal driving (approx. 70mi each day), the code has not gone away.