AutoCodes – Mitsubishi – P1231 Mitsubishi

P1231 Mitsubishi Code - Active Stability Control Plausibility

Quick Answer

P1231 Mitsubishi indicates Active Stability Control Plausibility. Common causes include Faulty Active Stability System, Active Stability System harness is open or shorted, Active Stability System circuit poor electrical connection. 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: P1231 Mitsubishi indicates Active Stability Control Plausibility.
Common causes: Common causes include Faulty Active Stability System, Active Stability System harness is open or shorted, Active Stability System circuit poor electrical connection.
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 4,534

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Jul 20, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1231 Mitsubishi Description

OBDII Code P1231 Mitsubishi - Active Stability Control Plausibility - AutoCodes.com — P1231 Mitsubishi Code - Active Stability Control Plausibility

What does this mean?

What are the Possible Causes of the DTC P1231 Mitsubishi?

Faulty Active Stability System
Active Stability System harness is open or shorted
Active Stability System circuit poor electrical connection

How to Fix the DTC P1231 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 P1231 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 P1231 Mitsubishi 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 P1231 Mitsubishi Code

1. What does the OBDII code P1231 mean for a Mitsubishi?

P1231 indicates an issue with the Active Stability Control system, specifically a plausibility error, which means the system has detected implausible or inconsistent data.

2. What are the common symptoms of P1231 in a Mitsubishi vehicle?

Common symptoms include the Active Stability Control (ASC) light illuminating, traction control being disabled, and reduced vehicle stability during acceleration or cornering.

3. What causes the P1231 code to appear?

The code is often caused by faulty wheel speed sensors, damaged wiring or connectors, a malfunctioning ASC control module, or mismatched tire sizes.

4. Can mismatched tires trigger the P1231 code?

Yes, mismatched tire sizes or uneven tire wear can cause discrepancies in wheel speed readings, leading to a plausibility error.

5. How can I fix the P1231 code on my Mitsubishi?

Inspect and repair any damaged wiring or connectors, check the wheel speed sensors, ensure tire sizes match, and verify the ASC module is functioning correctly.

6. Is it safe to drive with the P1231 code active?

While the vehicle may still be drivable, the stability control system may not function properly, increasing the risk of losing control in slippery or emergency conditions.

7. How do you diagnose the P1231 code on a Mitsubishi?

A technician will use an OBDII scanner to confirm the code, inspect the wheel speed sensors and wiring, and test the ASC control module for proper function.

8. Can a weak battery cause the P1231 code?

Yes, low voltage from a weak or failing battery can disrupt the ASC system's communication and trigger the P1231 code.

9. Does the P1231 code require reprogramming the ASC module?

In some cases, if the ASC module is faulty or has outdated software, reprogramming or replacing the module may be necessary to resolve the issue.

10. What is the estimated repair cost for resolving the P1231 code?

Repair costs vary but may range from $100 to $400, depending on whether the issue involves sensor replacement, wiring repairs, or ASC module servicing.