I have your tune in my ECM on a 5500 Kodiac Super C motorhome. It is setting code P0315 crankshaft position sensor not learned and PO332 knock sensor S2 circuit low voltage. Purchased date 02/08/2021 and purchased a ECM with the tune. Kept the original for back up. I have replaced the spark plugs. Motorhome has just over 24K miles on it.. The tune has less than 3K on it. what is causing this condition?
Thanks for your help.( Thomas Roberts, 03/16/2025 )
P0315 can occur when the ECM is replaced but typically doesn't cause any issues and if it's running fine then not something that needs to be done. To get this code to go away, it requires a scan tool to perform a "Crankshaft Relearn Procedure". The P0332 is an issue with the knock sensor circuit on the passenger side of the engine. This is most commonly caused by a faulty sensor, compromised wiring or a poor connection.
Will this reprogram the TCM to lower the Overdrive shift point to 48mph?( ALBrandwood, 10/05/2023 )
No, this is for factory programming only. If you want the modified Allison tune you will need to purchase this: https://www.ultrarvproducts.com/UPTCM
Add to what I previously sent in, I have also replaced both Knock Sensors. Also checked them and both are within spec's.( James E Haney, 07/02/2023 )
Not answered yet.
Code P0332 Knock sensor. It comes on early into a trip or sometimes just going down the road. I have a scan gauge II that i use to reset the code. Sometimes it will go for miles before it sets again. I have replaced the MAF, new spark plugs, new wires new air filter, new 02 sensors. Ran 91 octane, still I get the knock sensor CEL. The engine runs perfectly no missing or no KNOCKS or pinging. Could this be a ECM issue?
Latest trip I got an average of 4.867 MPG going to branson Mo from our home, near cape girardeau, about 211 miles. It did do better coming back probably about 6. I drive at around 62 MPH never higher and use Cruise Control quite a bit, although foot feed when going through the big hills.
The inside of the Tail pipes are black soot. Also noted that when I activate the headlights, a beeper goes off have to check that out. Could a reprogram of the ECM help in any of this? ( James E Haney, 07/02/2023 )
Hi James,
I have sent the diagnostics for that code to your email. Please go through that and if you still do not come up with a solution, reach back out by replying to that email. Have a great day!
I have a 02 Silverado 2500Hd 6.0 with 217000. It is a good running motor. Will your tune wake her up a little? ( Adam R DeVries, 07/23/2022 )
Yes, the tune will definitely wake it up: https://www.ultrarvproducts.com/Ultrapower-GM-Workhorse-8.1L-Custom-Tuning