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Engine-Codes – Generic – P1860

P1860 Code - TCC PWM Solenoid Circuit Electrical

Quick Answer

The P1860 code indicates a problem with the Torque Converter Clutch (TCC) Pulse Width Modulation (PWM) Solenoid Circuit. Common causes include Faulty TCC PWM solenoid, Wiring issues or poor electrical connections, Low transmission fluid level or dirty fluid. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P1860 indicates TCC PWM Solenoid Circuit Electrical.
Common causes
Common causes include Faulty TCC PWM solenoid, Wiring issues or poor electrical connections, Low transmission fluid level or dirty fluid.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1860 Description

The P1860 code indicates a problem with the Torque Converter Clutch (TCC) Pulse Width Modulation (PWM) Solenoid Circuit. The TCC solenoid is responsible for controlling the engagement and disengagement of the torque converter clutch, which plays a crucial role in the vehicle's transmission system. When the TCC solenoid circuit malfunctions, it can lead to issues with the torque converter clutch, affecting the vehicle's performance and fuel efficiency.

OBDII Code P1860 - TCC PWM Solenoid Circuit Electrical
P1860 Code - TCC PWM Solenoid Circuit Electrical

Common Causes of P1860

  1. Faulty TCC PWM solenoid
  2. Wiring issues or poor electrical connections
  3. Low transmission fluid level or dirty fluid
  4. Internal transmission damage
  5. PCM (Powertrain Control Module) failure

Symptoms of P1860

  1. Check Engine Light illuminated
  2. Transmission slipping or delayed engagement
  3. Decreased fuel efficiency
  4. Harsh shifting or erratic transmission behavior

How to Fix P1860

  1. Diagnose the code using a scan tool to confirm the issue.
  2. Inspect the TCC PWM solenoid and its wiring for any damage or corrosion.
  3. Check the transmission fluid level and condition, topping off or replacing as needed.
  4. Replace the faulty TCC PWM solenoid if necessary.
  5. Clear the code and test drive the vehicle to ensure the issue is resolved.

Cost to Fix P1860

The cost of repairing a TCC PWM solenoid circuit electrical issue can vary depending on the specific vehicle make and model, as well as the extent of the problem. Typically, the cost of parts for a TCC solenoid replacement ranges from $50 to $150, while the labor cost can range from $100 to $300. In total, the repair could cost anywhere from $150 to $450. It's important to note that labor rates can vary between auto repair shops, so it's recommended to obtain quotes from different shops to ensure a fair price.

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Code P1860 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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