Code P1400

nissan
altima

#1

I got this code. I got the hose and pipe cleaned. Changed the EGR solenoid. The code was reset. I drove the car from Pennslyvania to Washington DC. Check engine light remained OFF. As soon as I got into stop & go traffic of DC the light came on. My mechanic checked it again reset the light then I drove the car for whole night from Pennsylvania to Atlanta - No light. The moment I got into atlanta city traffic POP came the light. My question is am I missing something. Does this info lead to specific part i need to change? Please help???

The car is 1999 Nissan Altima GXE


#2

Did you clean the sensor feed pipes? If they are clean, you may have an EGR flow sensor going bad.


#3

Thanks, My mechanic suggested intake manifold pipes. Are you saying the same thing?


#4

The egr is operated by a solenoid. The most common code is egr pintle “stuck”. You have a new egr. So the egr should be working fine. If the egr ports are plugged due to carbon, that will no affect on egr on/off operation and computer should be happy.