AutoCodes – Jeep – U142A Jeep

U142A Jeep Code - Implausible PRNDL Signal Received

Quick Answer

There are two qualifying states that the Occupant Restraint Control (ORC) Module uses to modify a Active Headrest (AHR) deployment. Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module (PCM) harness is open or shorted, Powertrain Control Module (PCM) 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: U142A Jeep indicates Implausible PRNDL Signal Received.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module (PCM) harness is open or shorted, Powertrain Control Module (PCM) 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 928

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 May 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U142A Jeep Description

There are two qualifying states that the Occupant Restraint Control (ORC) Module uses to modify a Active Headrest (AHR) deployment. One is the PRNDL state signal over the CAN C Bus network. The other is the actual transmission gear state. The ORC utilizes multiple vehicle data bus network communication to support modification of the AHR when it is established the gear state is reverse. The PRNDL data (status and reverse gear state) shall be stored in the Event Data Recorder (EDR). This Diagnostic Trouble Code (DTC) will set disabling AHR activation only for the amount of time the transmission position indicates a reverse state. The supply voltage is 9 to 16 volts. Airbag warning light (AWL) will be illuminated due to no PRNDL message DTC. The PRNDL message is required by the ORC to disable the active headrests when in reverse. An active fault takes 6 seconds to set and indicates the message is not being received by the ORC. Receiving 2 valid PRNDL state and Reverse gear messages will change the fault to Stored. The AWL shall be on for a minimum of 12 seconds.

OBDII Code U142A Jeep - Implausible PRNDL Signal Received - AutoCodes.com — U142A Jeep Code - Implausible PRNDL Signal Received

What does this mean?

What are the Possible Causes of the DTC U142A Jeep?

Faulty Powertrain Control Module (PCM)
Powertrain Control Module (PCM) harness is open or shorted
Powertrain Control Module (PCM) circuit poor electrical connection
Faulty Transmission Control Module (TCM)

How to Fix the DTC U142A Jeep?

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 U142A Jeep 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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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 U142A Jeep Code

1. What are the common symptoms of OBDII code U142A in a Jeep related to an Implausible PRNDL signal received?

- Common symptoms include issues with shifting gears, incorrect gear display on the dashboard, and potential stalling of the vehicle.

2. What are the possible causes of the U142A code in a Jeep?

- The U142A code can be triggered by a faulty transmission range sensor, damaged wiring or connectors in the transmission system, or a malfunctioning TCM (transmission control module).

3. How can I diagnose the U142A code in my Jeep?

- Diagnosis involves using a diagnostic scanner to read the code, checking the transmission range sensor for proper operation, inspecting the wiring and connectors for damage, and testing the TCM functionality.

4. Can I drive my Jeep with the U142A code present?

- It is not recommended to drive your Jeep with the U142A code as it can lead to potential transmission issues and unsafe driving conditions.

5. How can I repair the U142A code in my Jeep?

- Repair options include replacing the transmission range sensor, repairing damaged wiring or connectors, or replacing the TCM if necessary.

6. Is it possible to clear the U142A code in a Jeep without fixing the underlying issue?

- Clearing the code without addressing the root cause may temporarily remove the warning light, but the problem will likely reoccur until the issue is properly resolved.

7. Can a DIY enthusiast fix the U142A code in a Jeep?

- Depending on the skill level and experience with automotive repairs, some DIY enthusiasts may be able to address the U142A code by following repair guides and using the necessary tools.

8. How much does it cost to repair the U142A code in a Jeep at a mechanic or dealership?

- Repair costs can vary based on the specific issue causing the code, but expect to pay for parts and labor which can range from a few hundred to over a thousand dollars.

9. Are there any preventive maintenance tips to avoid the U142A code in a Jeep?

- Regularly inspecting and maintaining the transmission system, checking for damaged wiring, and promptly addressing any transmission-related issues can help prevent the occurrence of the U142A code.

10. Will the U142A code cause my Jeep to fail an emissions test?

- Yes, the U142A code can cause your Jeep to fail an emissions test as it indicates a problem with the transmission system that can affect the vehicle's overall performance and emissions output.