AutoCodes – Jeep – U113F Jeep

U113F Jeep Code - Lost Communication With Active Exhaust Valve 1

Quick Answer

The purpose of the Active Exhaust Valves is to reduce exhaust noise in order to comply with pass-by noise regulations. Common causes include Faulty Active Exhaust Valve Actuator, Active Exhaust Valve Actuator harness is open or shorted, Active Exhaust Valve 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: U113F Jeep indicates Lost Communication With Active Exhaust Valve 1.
Common causes: Common causes include Faulty Active Exhaust Valve Actuator, Active Exhaust Valve Actuator harness is open or shorted, Active Exhaust Valve 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 555

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 Jul 02, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U113F Jeep Description

The purpose of the Active Exhaust Valves is to reduce exhaust noise in order to comply with pass-by noise regulations. The Active Exhaust Valves system consists of two main components. The first is the mechanical butterfly valves, which are welded into the exhaust pipe on each bank. Attached to each valve is a smart actuator. These are connected to the mechanical valves via a transmission spring to help reduce heat transfer from the butterfly valves to the actuators.
The Active Exhaust Valve actuators communicate with the Powertrain Control Module (PCM) over a LIN Bus circuit. Each Active Exhaust Valve actuator, one for the left (actuator 1) and one for the right (actuator 2), has a unique part number/internal ID. The PCM can identify each actuator's location by this unique ID. Based on engine torque, rpm, and vehicle speed, the PCM sends position commands to the Active Exhaust Valve actuators. These actuators then move the butterfly valves to the commanded positions. An internal Hall Effect sensor counts the pulses to determine the 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 calibration is unsuccessful for any reason, the actuators self-diagnose and report fault flags to the PCM over the LIN Bus.
If the valve position does not match the 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 if the transmission spring is broken or missing, the actuator will continue to rotate indefinitely and set a fault. Additionally, if the mechanical valve is stuck and cannot move, a fault will be set.

OBDII Code U113F Jeep - Lost Communication With Active Exhaust Valve 1 - AutoCodes.com — U113F Jeep Code - Lost Communication With Active Exhaust Valve 1

What does this mean?

What are the Possible Causes of the DTC U113F Jeep?

Faulty Active Exhaust Valve Actuator
Active Exhaust Valve Actuator harness is open or shorted
Active Exhaust Valve Actuator circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC U113F 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 U113F 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 U113F Jeep Code

1. What are common symptoms of OBDII code U113F in a Jeep related to the active exhaust valve?

- Common symptoms include poor engine performance, decreased fuel efficiency, and a possible illuminated check engine light.

2. What can cause the OBDII code U113F, indicating lost communication with active exhaust valve 1 in a Jeep?

- Possible causes include a faulty active exhaust valve actuator, damaged wiring or connectors, or a communication error within the vehicle's network.

3. How can I diagnose the issue causing the U113F code in my Jeep related to the active exhaust valve?

- A thorough inspection of the active exhaust valve system, wiring, and connectors is recommended. Using a diagnostic scanner to check for communication errors can help pinpoint the issue.

4. Is it safe to continue driving my Jeep with the U113F trouble code related to the active exhaust valve?

- It is generally not recommended to continue driving with this code present, as it can lead to further damage and potential engine issues. It's best to address the problem promptly.

5. Can a DIY enthusiast repair the U113F code indicating lost communication with active exhaust valve 1 in a Jeep?

- Depending on the root cause of the issue, some repairs may be suitable for a DIY enthusiast. However, complex electrical or mechanical repairs might require professional assistance.

6. Are there any quick tips for troubleshooting the U113F code in a Jeep with active exhaust valve communication problems?

- Checking and ensuring all wiring connections are secure, inspecting for visible damage, and resetting the trouble code to see if it reoccurs are good initial steps for troubleshooting.

7. Will resetting the OBDII code U113F related to the active exhaust valve in my Jeep make the problem go away permanently?

- Resetting the code may clear it temporarily, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's important to diagnose and repair the root cause.

8. How much does it typically cost to fix the U113F code indicating lost communication with active exhaust valve 1 in a Jeep?

- Repair costs can vary depending on the cause of the issue. Simple fixes like replacing a damaged wire may be relatively inexpensive, while replacing a faulty actuator could be more costly.

9. Can extreme weather conditions or off-road driving affect the active exhaust valve system in a Jeep and trigger the U113F trouble code?

- Yes, extreme conditions or rough terrain can potentially damage components of the active exhaust valve system, leading to communication errors and triggering the U113F trouble code.

10. Is the active exhaust valve system critical for the proper functioning of a Jeep, and should I prioritize fixing the U113F trouble code?

- While the active exhaust valve system may not be critical for basic operation, addressing the U113F trouble code promptly is recommended to prevent potential engine performance issues and ensure optimal vehicle function.