← View Generic P0861 Guide Severity: Medium
🚗 Vehicle-Specific Guide

This guide is customized for your 2020 Chevrolet SILVERADO 1500 PICKUP

P0861: P0861: Transmission Control Module (TCM) - Pressure Control Solenoid 'A' Circuit Low

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost
$200 - $800
Parts & Labor
Difficulty
3/5
1-2 hours
DIY Possible?
❌ No
Pro recommended
Your Vehicle
2020 Chevrolet
SILVERADO 1500 PICKUP
⚠️

Important for 2020 Chevrolet SILVERADO 1500 PICKUP Owners

Before starting repairs, verify which engine your 2020 Chevrolet SILVERADO 1500 PICKUP has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0861 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The TCM has detected a low voltage signal from the Pressure Control Solenoid 'A' circuit, which may indicate a faulty solenoid, wiring issue, or a problem with the transmission control module.
⚠️

Symptoms

  • • Transmission slipping
  • • hesitation
  • • or refusal to engage gears
  • • unusual noises
  • • or a check engine light.
🔍

Common Causes

  • • Faulty Pressure Control Solenoid 'A'
  • • wiring issue
  • • transmission control module failure
  • • or a problem with the transmission's hydraulic system.
🛠️

How to Fix P0861 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check the wiring harness for damage or corrosion and repair/replace as needed. 2. Test the Pressure Control Solenoid 'A' circuit with a multimeter to ensure proper voltage. 3. Replace the Pressure Control Solenoid 'A' if faulty. 4. Update the transmission control module's software if necessary. 5. Perform a transmission fluid flush and check the fluid level.

🔧

Need Maintenance Info for Your SILVERADO 1500 PICKUP?

Get oil capacity, filter specs, and torque settings for your specific 2020 Chevrolet SILVERADO 1500 PICKUP.

View 2020 Chevrolet SILVERADO 1500 PICKUP Specs

Parts for 2020 Chevrolet SILVERADO 1500 PICKUP

Pressure Control Solenoid 'A' Shop ↗ Wiring harness Shop ↗

Essential Tool

Must Have

OBD2 Scanner

Read & clear codes on your 2020 Chevrolet SILVERADO 1500 PICKUP

Shop Scanners ↗
🔗

Related Diagnostic Codes

Other codes that may appear with P0861

P0859 Sequential Code

P0859: Transmission Control Module (TCM) Range/Performance Issue

Medium
P0860 Sequential Code

P0860: Transmission Control Module (TCM) Range/Performance Problem

Medium
P0862 Sequential Code

P0862: Transmission Control Module (TCM) - Low Transmission Fluid Pressure

Medium
P0863 Sequential Code

P0863: Transmission Control Module (TCM) - Low Transmission Fluid Pressure

Medium

💡 Why These Codes Are Related:

  • • Similar Issues: Same root cause or component failure
  • • Related Problems: Often occur together due to system interactions
  • • Sequential Codes: Progressive failure stages or multiple sensors
  • • Same System: Components within the same automotive system