AutoCodes – Jeep – U142C Jeep

U142C Jeep Code - implausible Data Received From Exhaust Valve 2

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 2 Actuator, Active Exhaust Valve 2 Actuator harness is open or shorted, Active Exhaust Valve 2 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: U142C Jeep indicates implausible Data Received From Exhaust Valve 2.
Common causes: Common causes include Faulty Active Exhaust Valve 2 Actuator, Active Exhaust Valve 2 Actuator harness is open or shorted, Active Exhaust Valve 2 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 607

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 U142C Jeep 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 U142C Jeep - implausible Data Received From Exhaust Valve 2 - AutoCodes.com — U142C Jeep Code - implausible Data Received From Exhaust Valve 2

What does this mean?

What are the Possible Causes of the DTC U142C Jeep?

Faulty Active Exhaust Valve 2 Actuator
Active Exhaust Valve 2 Actuator harness is open or shorted
Active Exhaust Valve 2 Actuator circuit poor electrical connection

How to Fix the DTC U142C 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 U142C 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 U142C Jeep Code

1. What are common symptoms of OBDII code U142C in a Jeep related to "Implausible Data Received From Exhaust Valve 2"?

- Common symptoms include rough idling, decreased engine performance, and potential stalling of the vehicle.

2. What are some possible causes of the U142C code in a Jeep indicating "Implausible Data Received From Exhaust Valve 2"?

- Possible causes may include a faulty exhaust valve position sensor, wiring issues, a malfunctioning Engine Control Module (ECM), or a mechanical problem with the exhaust valve itself.

3. How can I diagnose the U142C code in my Jeep related to "Implausible Data Received From Exhaust Valve 2"?

- Diagnosing the issue may involve performing a thorough inspection of the exhaust valve sensor, checking the wiring for any damage or loose connections, and using a scan tool to monitor sensor data and ECM response.

4. Can I continue driving my Jeep with the U142C code indicating "Implausible Data Received From Exhaust Valve 2"?

- It is not recommended to drive the vehicle with this code present, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.

5. How can I repair the U142C code in my Jeep associated with "Implausible Data Received From Exhaust Valve 2"?

- Repair options may include replacing the exhaust valve position sensor, repairing any damaged wiring, resetting the ECM, or seeking assistance from a qualified mechanic for a thorough diagnosis and repair.

6. Is the U142C code in a Jeep related to "Implausible Data Received From Exhaust Valve 2" a common issue?

- While it may not be as common as some other OBDII codes, encountering this code can happen, especially in older vehicles or those with high mileage.

7. Can a DIY enthusiast fix the U142C code indicating "Implausible Data Received From Exhaust Valve 2" in a Jeep?

- Depending on the DIYer's skill level and access to tools, it may be possible to address this issue. However, due to the complexity of the system involved, professional assistance may be recommended.

8. Will resetting the OBDII system clear the U142C code related to "Implausible Data Received From Exhaust Valve 2" in my Jeep?

- While resetting the system may temporarily clear the code, it is crucial to identify and address the underlying issue causing the code to prevent it from reoccurring.

9. How long does it typically take to repair the U142C code in a Jeep indicating "Implausible Data Received From Exhaust Valve 2"?

- The repair time can vary depending on the specific cause of the code and the complexity of the repair needed. It is best to consult with a mechanic for an accurate estimate.

10. Are there any preventive measures I can take to avoid the U142C code related to "Implausible Data Received From Exhaust Valve 2" in my Jeep?

- Regular maintenance, such as checking and replacing sensors as needed, inspecting wiring for damage, and addressing any engine performance issues promptly, can help prevent the occurrence of this code.