Buick Century EGR Code You can hear the fuel pump come on there's gas at the shrader valve where you put PSI gauge on the tree. Changed the gas filter. Took it got it scanned EGR code and (CMP) Sensor code came up.
Problem on my 2001 Pontiac Grand Prix check engine light OBD scan code p1404 was pulled. Replaced the EGR valve, but code came back. Any ideas much appreciated on how to fix this problem.
Oldsmobile Aurora V8 4.0 Liter The "service engine soon" light is on. Sometimes it turns off but only for about 5 miles and then comes on again. I used a computer reader and I found 4 codes :P0404 P0300 P1645 and P0404.
The exhaust gas recirculation (EGR) system is used to lower oxides of nitrogen (NOx) emission levels caused by high combustion temperature. It does this by decreasing combustion temperature.
The main element of the system is the EGR valve. The EGR valve feeds small amounts of exhaust gas back into the combustion chamber. With the fuel/air mixture thus diluted, combustion temperatures are reduced. LEARN MORE
What does i have to do to fix my check engine light codes for p0174, p0171 and p0139 on my suzuki verona?
Check for vacuum leaks and the operation of the EGR valve.