AutoCodes – Cadillac – P1864 Cadillac

P1864 Cadillac Code - Torque Converter Clutch Enable Solenoid Electrical Fault Conditions

Quick Answer

The Torque Converter Clutch (TCC) Solenoid Valve is an electrical device used with the TCC PWM Solenoid Valve in order to control the fluid acting on the TCC valve. Common causes include Faulty Torque Converter Clutch (TCC), Torque Converter Clutch (TCC) harness is open or shorted, Torque Converter Clutch (TCC) 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: P1864 Cadillac indicates Torque Converter Clutch Enable Solenoid Electrical Fault Conditions.
Common causes: Common causes include Faulty Torque Converter Clutch (TCC), Torque Converter Clutch (TCC) harness is open or shorted, Torque Converter Clutch (TCC) 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 3,894

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 Jan 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1864 Cadillac Description

The Torque Converter Clutch (TCC) Solenoid Valve is an electrical device used with the TCC PWM Solenoid Valve in order to control the fluid acting on the TCC valve. The TCC valve controls TCC application and release. The solenoid is a normally-open, ON/OFF device. The TCC Sol. Valve attaches to the transmission case assembly extending into the pump cover. The Vehicle Control Module (VCM) monitors the Throttle Position (TP) voltage, the vehicle speed, and other inputs in order to determine when to energize the TCC Sol. Valve.
With the engine speed over 500 rpm for 5 seconds, not in Fuel Shut-off mode, the Powertrain Control Module (PCM) detects the Torque Converter Clutch (TCC) Solenoid Control voltage did not meet calibration (too high or too low). - Refer to the correct code repair chart in other manuals or media.

OBDII Code P1864 Cadillac - Torque Converter Clutch Enable Solenoid Electrical Fault Conditions - AutoCodes.com — P1864 Cadillac Code - Torque Converter Clutch Enable Solenoid Electrical Fault Conditions

What does this mean?

What are the Possible Causes of the DTC P1864 Cadillac?

Faulty Torque Converter Clutch (TCC)
Torque Converter Clutch (TCC) harness is open or shorted
Torque Converter Clutch (TCC) circuit poor electrical connection

How to Fix the DTC P1864 Cadillac?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1864 Cadillac 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.

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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.