AutoCodes – Buick – P1886 Buick

P1886 Buick Code - Transaxle Shift Timing Solenoid Performance

Quick Answer

The 3-2 Shift Solenoid Valve Assembly (3-2 SS Valve Assy.) Is a normally-closed, 3-port, on/off device that controls the 3-2 downshift. Common causes include Faulty Transaxle Shift Timing Solenoid, Transaxle Shift Timing Solenoid harness is open or shorted, Transaxle Shift Timing 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: P1886 Buick indicates Transaxle Shift Timing Solenoid Performance.
Common causes: Common causes include Faulty Transaxle Shift Timing Solenoid, Transaxle Shift Timing Solenoid harness is open or shorted, Transaxle Shift Timing 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 4,446

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 Sep 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1886 Buick Description

The 3-2 Shift Solenoid Valve Assembly (3-2 SS Valve Assy.) Is a normally-closed, 3-port, on/off device that controls the 3-2 downshift. The solenoid attaches to the control valve body within the transmission. The Vehicle Control Module (VCM) controls the solenoid by providing a ground path on circuit. During a 3-2 downshift, the 2-4 band applies as the 3-4 clutch releases. The VCM varies the timing between the 3-4 clutch release and the 2-4 band apply depending on the vehicle speed and the throttle position.

OBDII Code P1886 Buick - Transaxle Shift Timing Solenoid Performance - AutoCodes.com — P1886 Buick Code - Transaxle Shift Timing Solenoid Performance

What does this mean?

What are the Possible Causes of the DTC P1886 Buick?

Faulty Transaxle Shift Timing Solenoid
Transaxle Shift Timing Solenoid harness is open or shorted
Transaxle Shift Timing Solenoid circuit poor electrical connection

How to Fix the DTC P1886 Buick?

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 P1886 Buick 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.