AutoCodes – Oldsmobile – P1860 Oldsmobile

P1860 Oldsmobile Code - TCC PWM Solenoid Circuit Electrical

Quick Answer

The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. Common causes include Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid, Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted, Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection. 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 Oldsmobile indicates TCC PWM Solenoid Circuit Electrical.
Common causes: Common causes include Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid, Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted, Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection.
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.

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Code Popularity 6,270

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 26, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1860 Oldsmobile Description

The Torque Converter Clutch Pulse Width Modulation (TCC PWM) solenoid valve controls the fluid acting on the converter clutch valve. The converter clutch valve controls the TCC application and release. The solenoid attaches to the control valve body within the transmission. The solenoid receives ignition voltage through circuit 239. The Powertrain Control Module (PCM) controls the solenoid by providing a ground path on circuit 418. Current flows through the solenoid coil according to the duty cycle (percentage of ON and OFF time). The TCC PWM solenoid valve provides a smooth engagement of the torque converter clutch by operating during a duty cycle percent of ON time. When the PCM detects a continuous open, short to ground or short to power in the TCC PWM solenoid valve circuit, then Diagnostic Trouble Code (DTC) P1860 sets. DTC P1860 is a type B DTC.

OBDII Code P1860 Oldsmobile - TCC PWM Solenoid Circuit Electrical - AutoCodes.com — P1860 Oldsmobile Code - TCC PWM Solenoid Circuit Electrical

What does this mean?

What are the Possible Causes of the DTC P1860 Oldsmobile?

Faulty Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid harness is open or shorted
Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid circuit poor electrical connection

How to Fix the DTC P1860 Oldsmobile?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

There is a factory service bulletin for the following Oldsmobile models:
2000-2002 Oldsmobile Intrigue
2000-2003 Oldsmobile Aurora
2000-2004 Oldsmobile Alero
2000-2004 Oldsmobile Silhouette
Oldsmobile Factory Service Bulletin OBDII Code P1860

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1860 Oldsmobile code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1860 Oldsmobile code?

Need more information on how to fix the P1860 Oldsmobile code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P1860 Oldsmobile Code

1. What does OBDII code P1860 for Oldsmobile indicate?

The P1860 code specifically relates to the transmission control module (TCM) detecting an issue with the TCC PWM solenoid circuit electrical.

2. What are common symptoms of a TCC PWM solenoid circuit electrical problem?

Common symptoms include harsh shifting, transmission slipping, decreased fuel efficiency, and the transmission not engaging properly.

3. What are some potential causes of the TCC PWM solenoid circuit electrical issue?

Potential causes may include a faulty TCC PWM solenoid, damaged wiring or connectors in the circuit, low transmission fluid levels, or a malfunctioning TCM.

4. How can I diagnose the TCC PWM solenoid circuit electrical problem?

Diagnosis typically involves using a scan tool to retrieve the OBDII code, conducting a visual inspection of the wiring and connectors, checking the transmission fluid level, and testing the TCC PWM solenoid for proper operation.

5. Can I continue driving with the P1860 code present?

It is not recommended to continue driving with the P1860 code as it can lead to further damage to the transmission system. It is best to address the issue promptly.

6. How can I repair a TCC PWM solenoid circuit electrical problem?

Repairing the issue may involve replacing the TCC PWM solenoid, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and resetting the TCM.

7. Are there any DIY tips for fixing the TCC PWM solenoid circuit electrical problem?

While some basic inspections and checks can be done by DIY enthusiasts, diagnosing and repairing the TCC PWM solenoid circuit electrical issue may require specialized tools and knowledge, so it is recommended to consult a professional mechanic.

8. How much does it typically cost to fix the TCC PWM solenoid circuit electrical issue?

The cost of fixing the TCC PWM solenoid circuit electrical issue can vary depending on the exact cause of the problem, the labor rates in your area, and whether any parts need to be replaced. It is advisable to get a few quotes from reputable mechanics.

9. Can a TCC PWM solenoid circuit electrical problem cause further damage if not addressed?

Yes, ignoring the TCC PWM solenoid circuit electrical issue can potentially lead to more severe transmission problems, increased fuel consumption, and even complete transmission failure over time.

10. How can I prevent TCC PWM solenoid circuit electrical issues in the future?

Regularly servicing your vehicle, checking transmission fluid levels, addressing any warning signs promptly, and ensuring proper maintenance can help prevent TCC PWM solenoid circuit electrical problems in the future.