AutoCodes – RAM – U142B RAM

U142B RAM Code - implausible Data Received From Exhaust Valve 1

Quick Answer

The purpose of the Active Exhaust Valves are to reduce exhaust noise in order to meet pass-by noise regulations. Common causes include Faulty Active Exhaust Valve 1 Actuator, Active Exhaust Valve 1 Actuator harness is open or shorted, Active Exhaust Valve 1 Actuator 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: U142B RAM indicates implausible Data Received From Exhaust Valve 1.
Common causes: Common causes include Faulty Active Exhaust Valve 1 Actuator, Active Exhaust Valve 1 Actuator harness is open or shorted, Active Exhaust Valve 1 Actuator 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 462

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U142B RAM Description

The purpose of the Active Exhaust Valves are to reduce exhaust noise in order to meet pass-by noise regulations. The Active Exhaust Valves consist of two parts. First is the mechanical butterfly valves that are welded into the exhaust pipe on each bank. Mounted to each of these is a smart actuator. They are connected to the mechanical valves through a transmission spring. This is to help reduce heat from transferring between the mechanical butterfly valves and the actuators.
The Active Exhaust Valve actuators communicate with the Powertrain Control Module (PCM) over a LIN Bus circuit. The Active Exhaust Valve actuator 1 (left) and Active Exhaust Valve actuator 2 (right) each has a unique part number/internal ID. The PCM can identify each actuator location by this unique ID. The PCM sends a position command to the Active Exhaust Valve actuators based on engine torque, rpm and vehicle speed. The Active Exhaust Valve actuators move the butterfly valves to the commanded position. An internal Hall Effect sensor counts the pulses and determines valve position. The valve actuators are calibrated at every Key-ON event. The PCM sends full open and full closed commands and checks the actual position against the commanded position. If for any reason the calibration is unsuccessful, the actuators are self-diagnosing and report fault flags to the PCM over the LIN Bus.
If the valve position doesn't match a predetermined calibration, a performance code is set and the valves will default to the full open position. If an actuator is not attached to the mechanical valve, or the transmission spring is broken or missing, the actuator will continue to rotate indefinitely and set a fault. Also, if the mechanical valve is stuck and will not move, a fault will set.

OBDII Code U142B RAM - implausible Data Received From Exhaust Valve 1 - AutoCodes.com — U142B RAM Code - implausible Data Received From Exhaust Valve 1

What does this mean?

What are the Possible Causes of the DTC U142B RAM?

Faulty Active Exhaust Valve 1 Actuator
Active Exhaust Valve 1 Actuator harness is open or shorted
Active Exhaust Valve 1 Actuator circuit poor electrical connection

How to Fix the DTC U142B RAM?

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 U142B RAM 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 U142B RAM code?

Need more information on how to fix the U142B RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U142B RAM 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 U142B RAM Code

1. What are the common symptoms of OBDII code U142B RAM related to implausible data received from exhaust valve 1?

- Common symptoms include engine misfires, rough idling, loss of power, and potentially increased fuel consumption.

2. What are the possible causes of OBDII code U142B RAM indicating implausible data from exhaust valve 1?

- Possible causes may include a faulty exhaust valve actuator, wiring issues, a malfunctioning PCM, or mechanical problems within the exhaust valve system.

3. How can I diagnose the issue causing OBDII code U142B RAM for exhaust valve 1?

- Diagnose the issue by performing a thorough inspection of the exhaust valve actuator, checking the wiring for any damage or loose connections, and using a diagnostic scanner to monitor data from the exhaust valve system.

4. Can I continue driving my vehicle with OBDII code U142B RAM related to exhaust valve 1 issue?

- It is not recommended to continue driving your vehicle with this code active, as it can lead to further damage to the engine or exhaust system.

5. How can I repair OBDII code U142B RAM for implausible data received from exhaust valve 1?

- Repair options may include replacing the exhaust valve actuator, repairing any damaged wiring, reprogramming the PCM, or addressing any mechanical issues within the exhaust valve system.

6. Are there any DIY tips for addressing OBDII code U142B RAM related to exhaust valve 1 issues?

- While some simple checks like inspecting the wiring connections can be done DIY, it is recommended to consult a professional mechanic for proper diagnosis and repair of this code.

7. How much does it typically cost to repair OBDII code U142B RAM for exhaust valve 1 problems?

- Repair costs can vary depending on the exact cause of the issue, but you can expect to pay anywhere from $200 to $800 for parts and labor.

8. Will resetting the OBDII code U142B RAM clear the issue with the exhaust valve 1?

- Resetting the code may temporarily clear the issue, but if the root cause is not addressed, the code is likely to reappear. It is essential to diagnose and fix the underlying problem.

9. Is OBDII code U142B RAM a common issue in specific vehicle makes or models?

- This code can occur in various vehicle makes and models, especially those equipped with exhaust valve actuators and advanced engine management systems.

10. How can regular maintenance help prevent OBDII code U142B RAM for exhaust valve 1 from occurring?

- Regular maintenance, including timely servicing of the exhaust system and engine components, can help prevent issues that may trigger OBDII code U142B RAM related to exhaust valve 1.