GM Error Code P1860: How to Fix It

Q: What does GM error code P1860 mean?

P1860 indicates an electrical fault in the Torque Converter Clutch (TCC) Pulse Width Modulated solenoid circuit. This solenoid controls when the torque converter locks up for improved fuel efficiency.

Q: Can I drive with P1860 error code?

You can drive short distances, but the transmission may not shift properly and fuel economy will suffer. Extended driving could cause transmission overheating and damage. Address the issue promptly.

Q: How much does it cost to fix P1860?

DIY repair costs range from $50-150 for a new solenoid plus fluids. Professional repair typically costs $300-600 depending on labor rates and whether additional transmission work is needed.

Q: What causes P1860 code in GM vehicles?

Common causes include faulty TCC solenoid, damaged wiring harness, poor electrical connections, low transmission fluid, or internal transmission control module problems.

Q: Will P1860 cause transmission damage?

If left unrepaired, P1860 can lead to transmission overheating, clutch damage, and eventual transmission failure. The torque converter may not lock properly, causing excessive heat buildup.

Abstract

GM error code P1860 indicates a problem with the Torque Converter Clutch (TCC) Pulse Width Modulated (PWM) solenoid electrical circuit. This fault can cause transmission shifting issues, reduced fuel economy, and potential overheating. The error occurs when the transmission control module detects an electrical problem in the TCC solenoid circuit.