Hello Team-
I have a reoccurring issue of the P0713 code popping up. There is a bit to the story. I don't know if I am the cause of it or if it is a parts issue of some sort. It all started a few years ago when I deleted / tuned and installed a new transmission in my truck.
When I deleted the truck and removed all the EGR/DEF systems I also removed as much as the wire harness for those systems as I could. In doing that I found out you need to have the exhaust differential pressure sensor hooked up still. If you remove that sensor the APPS 2 wire will not be happy and that messes up your throttle since they are both tired to the same system for power. I got that issue figured out, but I can’t help but feel that the P0713 code might be caused from me removing the unused sensors and wire harness. I made sure all the wires were capped off and protected. All the chassis grounds are intact.
Looking at the wire diagrams I don’t see where the transmission fluid temp sensor could be tied to anything I removed in EGR/DEF wire harness.
Transmission temp signal wire – DG/OG T54
Ground wire – DB/DG K900
So, I can't figure out why the code keeps popping up? The sensor reads fine after its cycles. When I first start the truck the trans temp sensor reads 1021 degrees F for a few seconds then it cycles / resets. Then the sensor starts to show the correct temp. When the correct temp starts being displayed the truck dings and the CEL comes on. I can turn the truck off clear the code and the code will stay gone for that run cycle. But the next time I start the truck the code pop again and generate the CEL.
I have checked the connectors, and it all appears to be fine. No corrosion or loose wires. I haven’t taken the connector apart yet. I hate wiring so I have just been putting that off. I have also considered buying a new transmission wire harness. But if the issue causing this is from the wires I removed or another issue entirely a new trans wire harness will not fix the problem nor will a new solenoid pack
I did everything all at once. Delete, tuning, turbo, trans and fuel all at the same time. So, it’s like a what came first the chicken or the egg situation. It might be wiring, might be the solenoid pack and or I might need to re load my tunes? Probably not the tune re load but I want to cover all corners of it.
(A side note: Time to time will get a P0933 code. The code clears every time. It happens when I shift into reverse and then back into drive. Seem to only really happen when the transmission is 140 degrees and above. I get a hard shift into drive and the code pops up. I clear the code and its fine. So, I don’t know if the P0933 that pops up sometimes has anything to do with the P0713? Maybe... It could more likely be the sensor is going bad. I just ordered a new one to see if that is the cure.)
I am kind of stuck on what I should do. I have thought about replacing the wire harness, trying another solenoid pack and maybe just clearing everything and reload my tunes?
I tried to send @TransEngineer a message and I was not able to. I guess I don’t have enough street credit on this sight to send PMs. I also saw he is retired now. Congrats to that!!
I would love to pick his brain or someone else’s.
So, any wire / transmission experts I would greatly appreciate your help and input. I am pretty set on trying to figure out this myself and not take it to a shop. If someone was able to help me out, I would have no problem paying for your help / diagnosing time if we needed to speak over the phone or I took too much of your time.
Thank you for your time and help guys!
I have a reoccurring issue of the P0713 code popping up. There is a bit to the story. I don't know if I am the cause of it or if it is a parts issue of some sort. It all started a few years ago when I deleted / tuned and installed a new transmission in my truck.
When I deleted the truck and removed all the EGR/DEF systems I also removed as much as the wire harness for those systems as I could. In doing that I found out you need to have the exhaust differential pressure sensor hooked up still. If you remove that sensor the APPS 2 wire will not be happy and that messes up your throttle since they are both tired to the same system for power. I got that issue figured out, but I can’t help but feel that the P0713 code might be caused from me removing the unused sensors and wire harness. I made sure all the wires were capped off and protected. All the chassis grounds are intact.
Looking at the wire diagrams I don’t see where the transmission fluid temp sensor could be tied to anything I removed in EGR/DEF wire harness.
Transmission temp signal wire – DG/OG T54
Ground wire – DB/DG K900
So, I can't figure out why the code keeps popping up? The sensor reads fine after its cycles. When I first start the truck the trans temp sensor reads 1021 degrees F for a few seconds then it cycles / resets. Then the sensor starts to show the correct temp. When the correct temp starts being displayed the truck dings and the CEL comes on. I can turn the truck off clear the code and the code will stay gone for that run cycle. But the next time I start the truck the code pop again and generate the CEL.
I have checked the connectors, and it all appears to be fine. No corrosion or loose wires. I haven’t taken the connector apart yet. I hate wiring so I have just been putting that off. I have also considered buying a new transmission wire harness. But if the issue causing this is from the wires I removed or another issue entirely a new trans wire harness will not fix the problem nor will a new solenoid pack
I did everything all at once. Delete, tuning, turbo, trans and fuel all at the same time. So, it’s like a what came first the chicken or the egg situation. It might be wiring, might be the solenoid pack and or I might need to re load my tunes? Probably not the tune re load but I want to cover all corners of it.
(A side note: Time to time will get a P0933 code. The code clears every time. It happens when I shift into reverse and then back into drive. Seem to only really happen when the transmission is 140 degrees and above. I get a hard shift into drive and the code pops up. I clear the code and its fine. So, I don’t know if the P0933 that pops up sometimes has anything to do with the P0713? Maybe... It could more likely be the sensor is going bad. I just ordered a new one to see if that is the cure.)
I am kind of stuck on what I should do. I have thought about replacing the wire harness, trying another solenoid pack and maybe just clearing everything and reload my tunes?
I tried to send @TransEngineer a message and I was not able to. I guess I don’t have enough street credit on this sight to send PMs. I also saw he is retired now. Congrats to that!!
I would love to pick his brain or someone else’s.
So, any wire / transmission experts I would greatly appreciate your help and input. I am pretty set on trying to figure out this myself and not take it to a shop. If someone was able to help me out, I would have no problem paying for your help / diagnosing time if we needed to speak over the phone or I took too much of your time.
Thank you for your time and help guys!
