U142C 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 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.
Code U142C Description
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.
What are the Possible Causes of the DTC U142C?
- 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?
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 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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Information for Specific Makes
- U142C Chrysler — implausible Data Received From Exhaust Valve 2
- U142C Dodge — implausible Data Received From Exhaust Valve 2
- U142C Jeep — implausible Data Received From Exhaust Valve 2
- U142C RAM — implausible Data Received From Exhaust Valve 2
Frequently Asked Questions about U142C Code
1. What are the common symptoms of OBDII code U142C (Implausible Data Received From Exhaust Valve 2)?
- Common symptoms include engine misfires, rough idling, loss of power, and possibly reduced fuel efficiency.
2. What are some possible causes of OBDII code U142C?
- The code U142C can be triggered by issues such as a faulty exhaust valve position sensor, wiring problems, or a malfunction in the engine control module (ECM).
3. How serious is OBDII code U142C?
- While the severity can vary, it is important to address this code promptly to prevent potential damage to the engine and ensure optimal vehicle performance.
4. How can I diagnose the source of OBDII code U142C?
- Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, checking the exhaust valve position sensor and related wiring, and testing the ECM for any faults.
5. Can I still drive my vehicle with OBDII code U142C?
- It is not recommended to drive the vehicle with this code, as it may lead to further engine damage or performance issues. It's best to address the issue as soon as possible.
6. What are some repair tips for resolving OBDII code U142C?
- Repair tips may include checking and replacing the exhaust valve position sensor, repairing any damaged wiring, and resetting the ECM to clear the code.
7. How much does it typically cost to repair OBDII code U142C?
- The cost of repairs for this code can vary depending on the specific issue and the labor rates in your area. It's advisable to consult with a mechanic for an accurate estimate.
8. Can I reset OBDII code U142C without fixing the underlying issue?
- While you can clear the code temporarily, it is crucial to address the root cause to prevent the code from reoccurring and potentially causing further problems.
9. Is OBDII code U142C a common issue in certain vehicle makes or models?
- This code may be more prevalent in specific vehicle makes or models that are equipped with exhaust valve position sensors and similar components.
10. How can I prevent OBDII code U142C from occurring in the future?
- Regular maintenance, timely sensor replacements, and addressing any engine issues promptly can help prevent the occurrence of OBDII code U142C.
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