AutoCodes – Toyota – C1370 Toyota

C1370 Toyota Code - Engine Or Transmission System Matching Error

Quick Answer

This Diagnostic Trouble Code (DTC) is set by the Skid Control ECU when the Engine Control Module (ECM) is replaced with one that has different engine and transmission information than the information stored in the Skid Control ECU. Common causes include Faulty VSC Actuator Assembly (Skid Control ECU), Faulty Engine Control Module (ECM). 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: C1370 Toyota indicates Engine Or Transmission System Matching Error.
Common causes: Common causes include Faulty VSC Actuator Assembly (Skid Control ECU), Faulty Engine Control Module (ECM).
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 11,904

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 Sep 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1370 Toyota Description

This Diagnostic Trouble Code (DTC) is set by the Skid Control ECU when the Engine Control Module (ECM) is replaced with one that has different engine and transmission information than the information stored in the Skid Control ECU. This DTC is also set when the VSC Actuator Assembly (Skid Control ECU) is replaced with one that has different engine and transmission information than the information stored in the ECM.

OBDII Code C1370 Toyota - Engine Or Transmission System Matching Error - AutoCodes.com — C1370 Toyota Code - Engine Or Transmission System Matching Error

What does this mean?

What are the Possible Causes of the DTC C1370 Toyota?

Faulty VSC Actuator Assembly (Skid Control ECU)
Faulty Engine Control Module (ECM)

How to Fix the DTC C1370 Toyota?

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 C1370 Toyota 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.

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Need more information on how to fix the C1370 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1370 Toyota code diagnosed by a professional: Find a repair shop in your area

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 C1370 Toyota Code

1. What does the OBDII code C1370 mean on a Toyota?

C1370 indicates an "Engine or Transmission System Matching Error," meaning there is a communication or compatibility issue between the engine control module (ECM) and the transmission control module (TCM).

2. What are the common symptoms of code C1370 in a Toyota?

Symptoms may include the check engine light or ABS light being illuminated, reduced engine performance, transmission shifting issues, or erratic vehicle behavior.

3. What causes the C1370 code to appear?

The code can be triggered by incorrect ECM/TCM programming, a mismatch in engine or transmission components, wiring issues, or faulty sensors.

4. Can a faulty ABS module cause code C1370?

Yes, a malfunctioning ABS module can contribute to this error if it disrupts communication between the engine and transmission systems.

5. How can I fix the C1370 code on my Toyota?

Begin by inspecting and repairing any damaged wiring or connectors. If the issue persists, check for proper ECM/TCM programming or software updates, and verify that engine and transmission components are compatible.

6. Is it safe to drive with the C1370 code present?

It is not recommended to drive for extended periods with this code, as it can lead to poor performance or further damage to the engine or transmission.

7. Can replacing the transmission trigger the C1370 code?

Yes, if the replacement transmission is not properly matched or programmed to the vehicleâ€™s ECM/TCM, the C1370 code may appear.

8. Will clearing the code fix the C1370 issue?

Clearing the code may reset the warning temporarily, but the underlying issue must be resolved to prevent the code from returning.

9. Can a weak battery cause the C1370 code?

A weak or failing battery can cause communication errors between modules, potentially triggering the C1370 code.

10. Do I need a professional mechanic to fix the C1370 code?

While basic inspections can be done at home, resolving compatibility or programming issues often requires specialized diagnostic tools and expertise, so consulting a professional is recommended.