AutoCodes – Mitsubishi – P1878 Mitsubishi

P1878 Mitsubishi Code - Gear Block 3rd

Quick Answer

The Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU) monitors if the gear engagement is normal. Common causes include Malfunction of Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU), Insufficient fluid level, Malfunction of TC-SST gear. 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: P1878 Mitsubishi indicates Gear Block 3rd.
Common causes: Common causes include Malfunction of Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU), Insufficient fluid level, Malfunction of TC-SST gear.
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 1,946

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 Feb 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1878 Mitsubishi Description

The Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU) monitors if the gear engagement is normal. The TC-SST-ECU set the OBDII code when it determined that the engagement of the 3rd gear to be impossible.

OBDII Code P1878 Mitsubishi - Gear Block 3rd - AutoCodes.com — P1878 Mitsubishi Code - Gear Block 3rd

What does this mean?

What are the Possible Causes of the DTC P1878 Mitsubishi?

Malfunction of Twin Clutch Sportronic Shift Transmission (TC-SST) Electronic Control Unit (ECU)
Insufficient fluid level
Malfunction of TC-SST gear
Malfunction of clutch assembly

How to Fix the DTC P1878 Mitsubishi?

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 P1878 Mitsubishi 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.

Need more information about the P1878 Mitsubishi code?

Need more information on how to fix the P1878 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

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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.

Frequently Asked Questions about P1878 Mitsubishi Code

1. What are the common symptoms of OBDII code P1878 in a Mitsubishi related to Gear Block 3rd?

- Common symptoms include harsh shifting between gears, delayed engagement into 3rd gear, and potential transmission slippage.

2. What are the possible causes of OBDII code P1878 in a Mitsubishi related to Gear Block 3rd?

- The code P1878 in a Mitsubishi related to Gear Block 3rd can be caused by issues such as a faulty transmission control module, low transmission fluid levels, or a malfunctioning shift solenoid.

3. How can I diagnose OBDII code P1878 in a Mitsubishi related to Gear Block 3rd?

- Diagnosis typically involves using an OBDII scanner to retrieve the trouble codes, conducting a visual inspection of the transmission components, and performing various tests to pinpoint the exact cause of the issue.

4. What are the repair options for OBDII code P1878 in a Mitsubishi related to Gear Block 3rd?

- Repair options may include replacing the transmission control module, addressing any transmission fluid leaks, repairing or replacing the shift solenoid, and ensuring proper transmission fluid levels.

5. Can I continue driving my Mitsubishi with OBDII code P1878 related to Gear Block 3rd?

- It is not recommended to continue driving your Mitsubishi with this code present, as it can lead to further damage to the transmission and potentially result in costly repairs.

6. How much does it typically cost to repair OBDII code P1878 in a Mitsubishi related to Gear Block 3rd?

- The cost of repair can vary depending on the specific cause of the issue and the extent of the damage. It is advisable to consult with a professional mechanic for an accurate estimate.

7. Are there any preventive maintenance tips to avoid OBDII code P1878 related to Gear Block 3rd in my Mitsubishi?

- Regularly checking and maintaining proper transmission fluid levels, addressing any leaks promptly, and following the manufacturer's recommended service intervals can help prevent issues leading to this code.

8. Can a DIY enthusiast fix OBDII code P1878 related to Gear Block 3rd in a Mitsubishi?

- While some simple tasks like checking fluid levels can be done by a DIY enthusiast, diagnosing and repairing complex transmission issues related to this code may require specialized tools and expertise best left to professional mechanics.

9. How urgent is it to address OBDII code P1878 related to Gear Block 3rd in my Mitsubishi?

- It is recommended to address this code promptly to prevent further damage to the transmission and avoid potential safety hazards while driving.

10. Will resetting the OBDII code P1878 related to Gear Block 3rd in my Mitsubishi make the issue go away?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the code to trigger. It is crucial to diagnose and address the root cause of the problem.