A couple of months ago the check engine light in my 96 Sentra 1.6l, 5-speed came on. A local service station read it a a defective speed sensor and ordered a new one from Nissan and replaced it. A short time later the check engine light came on again and it was the speed sensor again. Nissan replaced the speed sensor under warranty but now the check engine light is on again and it reads defective speed sensor. I can't believe speed sensors are going bad this often. Anybody have this problem or have any clues?
Does the speedo still work?If it is bad the speedo shouldn't work, otherwise you have some bad wiring.My 98 Frontier has 200k on it and has never needed a VSS so I think the problem may lie elsewhere in the circuit.
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1998 Nissan Frontier XE/2wd/5spd 1 owner, 264k miles
1985 Olds Cutlass, 350 Chevy, owned for 14 years
WANTED: 1968-1973 Datsun 510 or 1991-1994 Sentra SE-R http://www.myspace.com/junkyardengineer
Thanks for your help guys. Yes the speedometer does work. Someone else suggested to me that there might be a bad ground so I guess I've got some troubleshooting to do.
As you can see, the signal (which I believe is negative) goes to the Speedometer.odometer before it gos to the ECU. There are 2 red wires going from the speed sensor to the speedometer. From the speedometer, the signal is carried through a purple/red wire to the ECU.
If it is not the speed sensor and the speedometer is reading fine, I would narrow your problem to:
1. The purple/red wire going from the Speedometer to the ECU is bad.
2. The speedometer/odometer unit is faulty and it is sending a bad signal to the ECU.
3. The ECU is bad.
Linear Mode
