P0785 (3-2 Shift Solenoid LS1/4L60E)
Thread Starter
Supreme Member
Joined: Mar 2000
Posts: 2,028
Likes: 0
From: St. Louis, MO
Car: 85' Firebird (Project), 92' RS
Engine: 2.8L, LS1
Transmission: 700R4, 4L60E
Axle/Gears: 3.42 Open , 10 Bolt (ukn)
P0785 (3-2 Shift Solenoid LS1/4L60E)
Hey all,
I've put this on the LS1Tech.com board, but thought i'd put it here too in case someone has experienced a similar situation.
I've got a 92 Camaro LS1/4L60E and recently got the CEL P0785 which corresponds to a malfunctioning 3-2 downshift solenoid. I dropped the pan, and replaced the 3-2 downshift solenoid, along with the A and B solenoids and called it a day. Hooked everything back up, closed the pan, added fluid, started, checked fluid levels, and topped off.
After I backed the car off the ramp, I got the same error message
So, with that said the typical problems are a short (i'm hoping for that) in the harness or a bad PCM. Engine/Transmission are 98' Firebird parts. I could swap PCM's, but would rather not spend the $$ if that's not going to be the problem, so I want to check continuity on the 4L60E harness for the 3-2 downshift solenoid to ensure it hasn't grounded out somewhere.
Has anyone else on here encountered a similar problem? And if so, what did you replace to fix it...I wanna drive the tar out of this car again!
I've put this on the LS1Tech.com board, but thought i'd put it here too in case someone has experienced a similar situation.
I've got a 92 Camaro LS1/4L60E and recently got the CEL P0785 which corresponds to a malfunctioning 3-2 downshift solenoid. I dropped the pan, and replaced the 3-2 downshift solenoid, along with the A and B solenoids and called it a day. Hooked everything back up, closed the pan, added fluid, started, checked fluid levels, and topped off.
After I backed the car off the ramp, I got the same error message
So, with that said the typical problems are a short (i'm hoping for that) in the harness or a bad PCM. Engine/Transmission are 98' Firebird parts. I could swap PCM's, but would rather not spend the $$ if that's not going to be the problem, so I want to check continuity on the 4L60E harness for the 3-2 downshift solenoid to ensure it hasn't grounded out somewhere.
Has anyone else on here encountered a similar problem? And if so, what did you replace to fix it...I wanna drive the tar out of this car again!
Thread
Thread Starter
Forum
Replies
Last Post
UltRoadWarrior9
Tech / General Engine
336
Apr 28, 2020 10:39 PM
darwinprice
Organized Drag Racing and Autocross
17
Oct 11, 2015 11:51 PM