P1860 Code
Thread Starter
Heel & Toe
Joined: Oct 2020
Posts: 15
Likes: 1
P1860 Code
Hello I own a 99 corvette and for several months I keep receiving code P1860. I have done reasearch to discover that this code is indicating an error with the Torque Converter Clutch Pulse Width Modulation Solenoid Valve. Since the error is indicating a short somewhere in the circuit, I have checked many engine grounds and electrical connections. Specifically G120 that the PCM should use to ground the solenoid but the code keeps returning. I have even taken the car to a transmission shop to replace the solenoid but the code keeps returning. Any help or knowledge in fixing this code would be greatly appreciated.
Thanks!
Thanks!
Last edited by KEARNEYN; Oct 17, 2020 at 09:22 AM.
Thread Starter
Heel & Toe
Joined: Oct 2020
Posts: 15
Likes: 1
Drifting
Joined: Sep 2009
Posts: 1,862
Likes: 595
From: Prescott, Arizona
I have no clue but check this:
https://www.engine-codes.com/p1860_chevrolet.html
I notice that the ignition circuit is mentioned and I am wondering if the ignition switch might be deteriorating, causing the DTC. Difficult to diagnose, but if the car exhibits other symptoms, that could narrow the diagnosis.
"The solenoid receives ignition voltage through circuit 239."
Any other, seemingly unrelated, symptoms?
https://www.engine-codes.com/p1860_chevrolet.html
I notice that the ignition circuit is mentioned and I am wondering if the ignition switch might be deteriorating, causing the DTC. Difficult to diagnose, but if the car exhibits other symptoms, that could narrow the diagnosis.
"The solenoid receives ignition voltage through circuit 239."
Any other, seemingly unrelated, symptoms?
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Joined: Nov 1999
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I have no clue but check this:
https://www.engine-codes.com/p1860_chevrolet.html
I notice that the ignition circuit is mentioned and I am wondering if the ignition switch might be deteriorating, causing the DTC. Difficult to diagnose, but if the car exhibits other symptoms, that could narrow the diagnosis.
"The solenoid receives ignition voltage through circuit 239."
Any other, seemingly unrelated, symptoms?
https://www.engine-codes.com/p1860_chevrolet.html
I notice that the ignition circuit is mentioned and I am wondering if the ignition switch might be deteriorating, causing the DTC. Difficult to diagnose, but if the car exhibits other symptoms, that could narrow the diagnosis.
"The solenoid receives ignition voltage through circuit 239."
Any other, seemingly unrelated, symptoms?
https://www.corvetteforum.com/forums...1860-code.html
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