P1860 – Infiniti DTC

Infiniti DTC P1860 – TCC PWM Solenoid Circuit Failure

DTC P1860 meaning on Infiniti

DTC P1860 on an Infiniti refers to a fault in the Torque Converter Clutch (TCC) Pulse Width Modulation (PWM) solenoid circuit. This code indicates a problem with the electrical circuit that controls the TCC solenoid, which is responsible for engaging and disengaging the torque converter lockup clutch.

Infiniti DTC P1860 symptoms

• Check Engine Light (CEL) illuminated on the dashboard
• Transmission slipping or shuddering
• Poor fuel economy
• Harsh shifting or delayed engagement

Infiniti DTC P1860 causes

• Faulty TCC PWM solenoid
• Corroded or damaged wiring in the TCC solenoid circuit
• Defective TCC solenoid driver in the transmission control module

Infiniti DTC P1860 seriousness

The DTC P1860 code should not be ignored as it can lead to drivability issues and potential damage to the transmission over time. It is recommended to address this issue promptly to prevent further complications.

How to diagnose DTC P1860 on Infiniti

1. Use a scan tool to retrieve the DTC P1860 code and any related codes
2. Inspect the TCC PWM solenoid and its wiring for visible damage or corrosion
3. Check the transmission control module for any faults related to the TCC solenoid circuit
4. Perform a voltage test on the TCC solenoid circuit to check for proper electrical signal

How to fix DTC P1860 on Infiniti

1. Replace the faulty TCC PWM solenoid
2. Repair or replace any damaged wiring in the TCC solenoid circuit
3. If the issue persists, consider replacing the transmission control module
4. Clear the DTC P1860 code after completing the repairs

How to erase DTC P1860 on Infiniti

1. Use a scan tool to access the vehicle’s onboard diagnostic system
2. Select the option to clear diagnostic trouble codes (DTCs)
3. Follow the on-screen prompts to confirm the code clearing process
4. Once the DTC P1860 has been successfully cleared, verify that the Check Engine Light is no longer illuminated

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