AutoCodes – Generic – U142A

U142A 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 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 1,221

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 May 23, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U142A 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 - Implausible PRNDL Signal Received - AutoCodes.com — U142A Code - Implausible PRNDL Signal Received

What does this mean?

What are the Possible Causes of the DTC U142A?

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?

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 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 U142A code?

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Need Help with the Code?

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Information for Specific Makes

U142A Chrysler — Implausible PRNDL Signal Received
U142A Dodge — Implausible PRNDL Signal Received
U142A Jeep — Implausible PRNDL Signal Received
U142A RAM — Implausible PRNDL Signal Received

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 Code

1. What are common symptoms of OBDII code U142A (Implausible PRNDL Signal Received)?

- Common symptoms include erratic shifting behavior, difficulty starting the vehicle, and illuminated warning lights on the dashboard related to the transmission.

2. What can cause the OBDII code U142A to trigger?

- The code U142A typically triggers due to a faulty transmission position sensor, damaged wiring or connectors in the transmission circuit, or a malfunctioning transmission control module.

3. How can I diagnose the issue related to code U142A?

- To diagnose the issue, you can use a diagnostic scan tool to retrieve the code and then perform a thorough inspection of the transmission position sensor, wiring, and connectors for any signs of damage or corrosion.

4. Is it safe to continue driving with the U142A code present?

- It is not recommended to continue driving with the U142A code present, as it can lead to further damage to the transmission system and potentially compromise the safety and performance of the vehicle.

5. Can I repair the U142A code issue myself?

- Depending on your level of automotive experience, you may be able to address the U142A code issue yourself by replacing the transmission position sensor, repairing damaged wiring, or resetting the transmission control module. However, seeking professional help is advisable for complex transmission issues.

6. Are there any quick fixes or temporary solutions for code U142A?

- Quick fixes or temporary solutions for the U142A code may include checking and tightening loose connectors, clearing the code with a scan tool, or ensuring the transmission fluid level is adequate. However, these may not solve the underlying issue permanently.

7. How much does it typically cost to repair the U142A code issue?

- The cost of repairing the U142A code issue can vary depending on the root cause of the problem, the extent of the damage, and labor costs. It is recommended to obtain quotes from automotive professionals for an accurate estimate.

8. Can extreme weather conditions affect the occurrence of code U142A?

- Yes, extreme weather conditions such as extreme heat or cold can potentially impact the performance of the transmission system, leading to issues like the U142A code due to sensor malfunctions or electrical disruptions.

9. Will disconnecting the battery reset the U142A code?

- Disconnecting the battery may temporarily reset the U142A code, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle is driven and the problem persists.

10. How urgent is it to address the U142A code?

- It is important to address the U142A code promptly to prevent further damage to the transmission system and ensure the safety and reliability of the vehicle. Ignoring the code can lead to more severe issues over time.