What causes a P0404 code?

Code P0404 activates when the car computer detects erratic EGR valve performance. The EGR system redirects exhaust gas back into the engine to lower the temperature in the cylinder and lessen nitrogen oxide (NOx) emissions. This system uses a valve to regulate the flow of exhaust coming back into the engine.

What does p0404 mean on an EGR valve?

Code P0404 usually indicates that there is a carbon build-up somewhere in the lines, or on other occasions, a bad EGR valve. Increased nitrogen oxide emission may indicate a failing EGR valve.

What is the EGR code for an Impala 3?

Related EGR codes: P0400, P0401, P0402, P0403, P0405, P0406, P0407, P0408, P0409 Hello, 2002 impala 3 4l v6, I just replaced the egr valve as I was getting check engine code p0404.

What causes the p0404 OBD-II trouble code?

All our repairs are backed by our 12-month / 12,000-mile warranty. P0404 is an OBD-II generic code that the engine control module (ECM) detected the engine exhaust gas recirculation (EGR) valve or sensor is out of specification range or its performance has gone out of specification parameters. What causes the P0404 code?

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.

Code P0404 usually indicates that there is a carbon build-up somewhere in the lines, or on other occasions, a bad EGR valve. Increased nitrogen oxide emission may indicate a failing EGR valve.

What are the letters on an EGR valve?

Most of the EGR valves will have the letters A thru’ E molded onto the EGR valve’s connector. I’ll be using these same letters for the circuit descriptions below: Ground circuit for EGR valve solenoid. Gray with Black stripe wire. EGR valve pintle position sensor Ground (provided by the PCM). Black wire. EGR pintle position signal circuit.

What does the DTC code p0404 stand for?

Diagnostic Trouble Code (DTC) P0404 stands for Exhaust Gas Recirculation Circuit Range/Performance Problem. It is a generic OBD trouble code that activates if the powertrain control module (PCM) detects erratic Exhaust Gas Recirculation (EGR) valve performance. Code P0404 activates when the car computer detects erratic EGR valve performance.

When did GM start using the EGR valve?

The EGR valve that’s covered by this article are for 3.1L, 3.4L, and 3.5L GM vehicles from 2000 to 2009 models years (although some late 1999 models use this type of EGR valve too). To make sure this tutorial applies to your specific vehicle, check this section out first: Identifying The EGR Valve.