P0904: P0904: Transmission Advanced System - Pressure Control Solenoid 'A' Circuit Low

on 2020 Chevrolet SILVERADO 1500 PICKUP

Fix Cost

$100 - $500

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2020 Chevrolet

SILVERADO 1500 PICKUP

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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 P0904 Mean on 2020 Chevrolet SILVERADO 1500 PICKUP?

The transmission control module (TCM) has detected a low voltage signal from the pressure control solenoid 'A' circuit, which may indicate a problem with the solenoid, wiring, or TCM.

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Symptoms

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

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Common Causes

• Faulty pressure control solenoid 'A'
• wiring issues
• TCM malfunction
• or low transmission fluid level.

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How to Fix P0904 on 2020 Chevrolet SILVERADO 1500 PICKUP

1. Check transmission fluid level and top off as needed. 2. Inspect and clean or replace the pressure control solenoid 'A' circuit wiring. 3. Test the solenoid with a multimeter to ensure proper voltage and resistance. 4. Update the TCM software if necessary. 5. Replace the pressure control solenoid 'A' if faulty.

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