Getting P0500 - already swapped trans speed sensors to no avail
My 2001 Jeep Grand Cherokee with the 4.7L motor is running really rough and eventually
stalls. Originally I pulled codes for misfires so I changed out all the spark plugs. Started up
the car and it's still doing the same thing. Idles rough and eventually stalls. After doing a
search on the P0500 code I went out and bought one speed sensor since both sensors are
the same. I swapped out the output sensor, started the car, same thing. I took the sensor I
just took out and swapped it with the input sensor, started the car, and still same thing.
Autozone also had a vehicle speed sensor but I think that's for the v6 version. It looks like a
white plastic plug. Even the thread is plastic. I couldn't find anything like it on my car.
I've read some jeeps have a speed sensor on the rear diff but I didn't see any sensors
connected to it.
What else should I try?
Fuel filter, and pump maybe.. also clean or replace EGR valve, also a bad CPS crank position sensor may cause those symptoms
If the CPS was bad, wouldn't it throw a code?
Not necessarily. The best way is to measure voltage directly with a meter. Codes are not exact. I had a bad MAP sensor code for a 95 Cherokee Sport and found out it just need new spark plugs. Also had a 96 Ford F250 throw a code for both fuel banks running lean and it was a sticking EGR valve.
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