Jaxgapn2
Junior Member
Hi, I have a 2002 dodge ram 1500 4.7 that I am about to lose my mind over. To begin with, cylinder 2 has low compression so I get the 302 code once in a while. My chk engine comes on, then goes off in a couple days. I personally can't tell the difference in the way it drives. I can't afford to get it fixed tho. Now all the sudden I get a code of 320 & 725. Remember, I don't know anything about cars/truck repair, but I do read up on whatever I am having issues with in hopes to understand it. I have my own cheap obd 2 scanner. To my understanding, there could be several different things causing this code. So I take it to a mechanic tell him my codes hoping he can narrow down the specific part. He tells me it's the engine speed sensor. He tells me to call around to get that part. I call around. & find that there is no such part called "engine speed sensor. There is wheel speed sensors, vehicle speed sensors, transmission speed sensors. Some people refer to some of them as the engine speed sensor, but they are not the same thing. I am very confused. Anyway, everything I have read comes down to the camshaft position sensor, & the crankshaft position sensor. I replaced them, cleaned my battery post, (which erased the codes) & drove around my neighborhood for a while to see if the codes came up again. Drove great for a little bit, then started jerking when it shifted, but no code came up. So I bought the transmission input sensor, not sure that's what it's called. Replaced it. Then I wonder if I am supposed to reset it again or not. I then read something about the other sensors need to relearn. What the hell is that? I drove it again, staying close to home just in case. It started off a little rough, the got better. Just about the time I started to think it's all good, it starts jerking again. I just parked it. I cannot find the answers I am looking for. Am I supposed to reset it? How do I relearn the sensors? Is there something else I am missing? I did ask if the low compression had anything to do with it, & I was told it didn't. I am missing a lot of work because of this. Someone please help me out with answers that are specific to my truck that I can understand. Thanks.