P0888: P0888: Transmission Control Module (TCM) Internal Temperature Sensor Circuit Malfunction

on 2021 Honda PASSPORT

Fix Cost

$200 - $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 P0888 Mean on 2021 Honda PASSPORT?

The Transmission Control Module (TCM) has detected a malfunction in the internal temperature sensor circuit, which monitors the transmission fluid temperature.

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Symptoms

• Transmission slipping
• hesitation
• or refusal to engage gears
• unusual noises
• or warning lights on the dashboard.

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Common Causes

• Faulty internal temperature sensor
• wiring issues
• or TCM software problems.

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How to Fix P0888 on 2021 Honda PASSPORT

1. Check the internal temperature sensor for any signs of damage or corrosion. Replace it if necessary. 2. Inspect the wiring harness for any damage or pinched wires. Repair or replace as needed. 3. Update the TCM software if necessary. 4. Clear any trouble codes and test the transmission.

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