Initially I had nothing. turn the key only dash lights radio. So I checked the power distribution box under the hood and found a relay fuse had been broken plus a 40A fuse blown, so I change them, tried it. The 40A blew on the spot. So instead of replacing it again I decided to place a jumper wire on the blown fuse. I also need to say that plugged in my code reader and had three pop up. They were C1155 LF speed sensor malfunction, U1262 standard communication protocol communication bus malfunction, P0340 module camshaft position sensor A circuit (bank 1 or single sensor) confirmed. Now I found the camshaft sensor unplugged so I connected it, the speed sensor was damaged so I replaced it. I then went ahead and pulled the PCM to visually look at it and see if I could notice anything, hot spots, corrosion, etc., then reconnected it. I did finally get it started and running.
It sounded good except for an intermittent grinding sound coming from near the top motor mount on the passenger side. But anyway I clear the U1262 and P0340 codes and it still started and ran, but when I finally change the speed sensor C1155 and cleared that code and then decided to start it to let the PCM cycle again to check everything one more time it is at this time I could not get the car to start again. The fuel pump does work, the relays have been checked. I have checked the coil pack (one six pack) it itself seems to be okay, but no power getting to it. I have already changed out the crankshaft sensor during this time, still no luck. At this time the engine cranks just fine but no spark. My worst case scenario is that using that jumper wire might have overheated a circuit in the PCM. But until I can get it running again I know the PCM will not give anymore codes or at least it has not yet through just cranking it, I have checked already. What have I overlooked? There are other possible causes I have learned about, I want to try this way before proceeding on first.
It sounded good except for an intermittent grinding sound coming from near the top motor mount on the passenger side. But anyway I clear the U1262 and P0340 codes and it still started and ran, but when I finally change the speed sensor C1155 and cleared that code and then decided to start it to let the PCM cycle again to check everything one more time it is at this time I could not get the car to start again. The fuel pump does work, the relays have been checked. I have checked the coil pack (one six pack) it itself seems to be okay, but no power getting to it. I have already changed out the crankshaft sensor during this time, still no luck. At this time the engine cranks just fine but no spark. My worst case scenario is that using that jumper wire might have overheated a circuit in the PCM. But until I can get it running again I know the PCM will not give anymore codes or at least it has not yet through just cranking it, I have checked already. What have I overlooked? There are other possible causes I have learned about, I want to try this way before proceeding on first.
Apr 9, 2018 at 11:06 PM
