AutoCodes – Chrysler – U142B Chrysler

U142B Chrysler 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 Chrysler 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.

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Code Popularity 473

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

What does this mean?

What are the Possible Causes of the DTC U142B Chrysler?

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 Chrysler?

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 Chrysler 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 U142B Chrysler Code

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

- Common symptoms may include poor engine performance, rough idling, misfiring, and potential decrease in fuel efficiency.

2. What are the possible causes of OBDII code U142B in a Chrysler indicating implausible data received from exhaust valve 1?

- Potential causes may include a faulty exhaust valve sensor, wiring issues, a malfunctioning PCM, or software glitches.

3. How can I diagnose the OBDII code U142B in a Chrysler related to implausible data received from exhaust valve 1?

- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the exhaust valve sensor and related wiring, and performing tests to determine the root cause.

4. Can I still drive my Chrysler with OBDII code U142B indicating implausible data received from exhaust valve 1?

- It is not recommended to drive the vehicle with this code present, as it may lead to further engine damage or safety issues. It is advisable to address the problem promptly.

5. How can I repair OBDII code U142B in a Chrysler related to implausible data received from exhaust valve 1?

- Repair options may include replacing the faulty exhaust valve sensor, repairing damaged wiring, updating the PCM software, or seeking assistance from a qualified mechanic.

6. Is it safe to reset the OBDII code U142B related to exhaust valve 1 without addressing the underlying issue?

- While resetting the code may temporarily clear the warning light, it is crucial to address the root cause to prevent potential damage to the engine and ensure proper vehicle operation.

7. Can weather conditions impact the occurrence of OBDII code U142B in a Chrysler indicating implausible data from exhaust valve 1?

- Extreme weather conditions such as excessive heat or cold may affect sensor readings and potentially trigger this code. It is important to consider environmental factors during diagnosis.

8. How long does it typically take to repair OBDII code U142B in a Chrysler related to implausible data received from exhaust valve 1?

- The repair time can vary depending on the exact cause of the issue, availability of parts, and the complexity of the repair. It is best to consult with a mechanic for a more accurate estimate.

9. Are there any preventive measures to avoid OBDII code U142B related to exhaust valve 1 in a Chrysler?

- Regular maintenance, such as checking sensor connections, inspecting wiring for damage, and keeping the engine well-tuned, can help prevent issues that may trigger this code.

10. Can OBDII code U142B in a Chrysler indicating implausible data from exhaust valve 1 be a recurring problem?

- If the root cause of the issue is not properly addressed, there is a possibility that the code may reappear. It is important to ensure thorough diagnosis and repair to prevent recurrence.