AutoCodes – GMC – P0871 GMC

P0871 GMC Code - Pressure Switch Solenoid 'E' Circuit Stuck Open

Quick Answer

The pressure switch manifold (PSM) is a multiple-switch assembly made up of three normally open (N/O) and one normally closed (N/C) pressure switches. Common causes include Faulty Pressure Switch Solenoid 'E', Pressure Switch Solenoid 'E' harness is open or shorted, Pressure Switch Solenoid 'E' 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: P0871 GMC indicates Pressure Switch Solenoid 'E' Circuit Stuck Open.
Common causes: Common causes include Faulty Pressure Switch Solenoid 'E', Pressure Switch Solenoid 'E' harness is open or shorted, Pressure Switch Solenoid 'E' 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 2,239

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 May 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0871 GMC Description

The pressure switch manifold (PSM) is a multiple-switch assembly made up of three normally open (N/O) and one normally closed (N/C) pressure switches. The E pressure switch monitors E shift valve positioning and relays it to the transmission control module (TCM). When E pressure switch is in the open state, E shift valve should be in the unstroked position.

OBDII Code P0871 GMC - Pressure Switch Solenoid 'E' Circuit Stuck Open - AutoCodes.com — P0871 GMC Code - Pressure Switch Solenoid 'E' Circuit Stuck Open

What does this mean?

What are the Possible Causes of the DTC P0871 GMC?

Faulty Pressure Switch Solenoid 'E'
Pressure Switch Solenoid 'E' harness is open or shorted
Pressure Switch Solenoid 'E' circuit poor electrical connection

How to Fix the DTC P0871 GMC?

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 P0871 GMC 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.