U113F RAM 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 RAM 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.
Code U113F RAM Description
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.
What are the Possible Causes of the DTC U113F RAM?
- 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 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 U113F 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.
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Frequently Asked Questions about U113F RAM Code
What does the U113F code mean on a RAM vehicle?
The U113F code indicates a loss of communication with Active Exhaust Valve 1, which controls exhaust flow and sound.
What are the common symptoms of the U113F code?
Symptoms may include a check engine light, reduced engine performance, abnormal exhaust sounds, or issues with exhaust valve operation.
What causes the U113F code to appear?
Common causes include wiring issues, a faulty active exhaust valve actuator, damaged connectors, or a failed control module.
Can the U113F code affect vehicle performance?
Yes, it can lead to reduced exhaust efficiency and potentially impact engine performance or sound characteristics.
How can I diagnose the U113F code?
Start by inspecting the wiring and connectors for damage, then use an OBDII scanner to confirm the code and check for related faults.
What should I check first if I encounter the U113F code?
Check the wiring harness and connectors near Active Exhaust Valve 1 for damage or corrosion.
Can the U113F code be cleared without fixing the issue?
Clearing the code without addressing the root cause may result in the code returning and potential performance issues persisting.
Does the U113F code require immediate attention?
While it may not cause immediate damage, addressing it promptly can prevent further exhaust system issues or performance degradation.
How much does it typically cost to repair the U113F code?
Repair costs vary but may range from $50 to $300 depending on whether it requires wiring repair, actuator replacement, or connector servicing.
Can I fix the U113F code myself?
If you’re comfortable inspecting wiring and connectors, you may be able to fix minor issues, but actuator replacement or advanced diagnostics may require professional assistance.
Discuss the causes and fixes for U113F RAM OBDII Code
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