Go to www.aa1car.com and see the troubleshooting codes and what does mean.
see the diagram attached you can by pass it. God bless you
SOURCE: Auto Diagnostic Trouble Code
cORRECT. tHIS CODE DOES DEALs With emmissions. P1400 deals with the EGR valve. In case u are not aware, EGR stands for Exhaust Gas Re-circulation. What really this valve does is that it re-cycles some of the exhaust gases into the cylinder for combustion. The EGR valve might be blocked or has malfunctioned. It is advised that this valve changed or consult with a mechanic who is knowledgeable about this technology. a malfunctioned/dis-abled EGR system will cause the car to fail an emissions test, and may cause the EGR passages in the cylinder head and intake manifold to become blocked with carbon deposits, necessitating extensive engine disassembly for cleaning. So it is advised that u repair this ASAP
SOURCE: 2000 NISSAN MAXIMA TRANSMISSION SLIPPING
If you havent already try to change the transmission filter.Sometimes when the filter gets dirty fluid pressure is comprimised and certain pumps and solenoids which control shifting inside the transmission function off of the fluid pressure,
SOURCE: car won't start
check first the ground connections and the terminals if they are loose. Check also the starter relay and its cables. Have the starter capacitor checked. If that does not resolve it go to the starter motor and have it checked.
SOURCE: Speed sensor location on a Nissan Maxima 2000 GXE...
There are two speed sensors one is called a revolution sensor that is located on the case of the transmission. You can take the driver side wheel off and see the sensor on the top of the case of the transmission. A 10mm bolt is holding it in. Easy fix
SOURCE: obd2 codes
po402 is egr flow excessive, remove and clean carbon out of valve. or replace it.
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