Code P1400

Maintenance/Repairs
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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.