P0991: P0991: Transmission Advanced System - Pressure Control Solenoid 'A' Circuit Low

on 2021 Honda PASSPORT

Fix Cost

$100 - $500

Parts & Labor

Difficulty

3/5

1-2 hours

DIY Possible?

❌ No

Pro recommended

Your Vehicle

2021 Honda

PASSPORT

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Important for 2021 Honda PASSPORT Owners

Before starting repairs, verify which engine your 2021 Honda PASSPORT has. Check your VIN or engine code to ensure you order the correct parts.

📖 What Does P0991 Mean on 2021 Honda PASSPORT?

The Powertrain Control Module (PCM) has detected a low voltage signal from the Pressure Control Solenoid 'A' circuit, indicating a problem with the transmission's pressure control system.

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Symptoms

• Transmission slipping
• hesitation
• or hesitation during acceleration
• unusual noises
• or difficulty shifting gears.

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Common Causes

• Faulty Pressure Control Solenoid 'A'
• clogged transmission filter
• low transmission fluid level
• or a faulty transmission pressure sensor.

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How to Fix P0991 on 2021 Honda PASSPORT

1. Check transmission fluid level and top off as necessary. 2. Inspect and clean the transmission filter. 3. Replace the Pressure Control Solenoid 'A' if faulty. 4. Check and replace the transmission pressure sensor if necessary.

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