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U1746 Jeep Code - Amplifier Module Missing Message

Quick Answer

The diagnostic code U1746 indicates that the Amplifier Module is not receiving the expected signals from the Radio/Entertainment Telematics Module (ETM), which can lead to a failure in audio amplification within the vehicle's sound system. Common causes include Faulty Amplifier Module, Amplifier Module harness is open or shorted, Poor electrical connection in the Amplifier Module circuit. 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
U1746 Jeep indicates Amplifier Module Missing Message.
Common causes
Common causes include Faulty Amplifier Module, Amplifier Module harness is open or shorted, Poor electrical connection in the Amplifier Module circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Nov 05, 2025
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Code U1746 Jeep Description

The diagnostic code U1746 indicates that the Amplifier Module is not receiving the expected signals from the Radio/Entertainment Telematics Module (ETM), which can lead to a failure in audio amplification within the vehicle's sound system. The Amplifier Module plays a crucial role in enhancing audio signals, allowing for a better listening experience by driving the speakers effectively. When this code is triggered, it suggests that the ETM is unable to communicate with the Amplifier Module, which may result in the amplifier being unable to function properly or not functioning at all.
OBDII Code U1746 Jeep - Amplifier Module Missing Message
U1746 Jeep Code - Amplifier Module Missing Message

Common Causes of U1746 Jeep

  1. Faulty Amplifier Module
  2. Amplifier Module harness is open or shorted
  3. Poor electrical connection in the Amplifier Module circuit
  4. Defective Radio/Entertainment Telematics Module (ETM)
  5. Corroded or damaged wiring in the audio system

Symptoms of U1746 Jeep

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. No audio output from the speakers
  3. Intermittent audio cutouts or distortion
  4. Inability to adjust audio settings such as balance and fade
  5. Unresponsive audio controls on the ETM

How to Fix U1746 Jeep

  1. Perform a thorough diagnostic scan to confirm the U1746 code and check for any additional codes.
  2. Inspect the wiring and connectors between the ETM and the Amplifier Module for any signs of damage or corrosion.
  3. Test the Amplifier Module for functionality; replace if it is found to be defective.
  4. Check the Radio/Entertainment Telematics Module for proper operation and replace if necessary.
  5. Clear the diagnostic codes and perform a test drive to ensure the audio system functions correctly.

Cost to Fix U1746 Jeep

The cost to diagnose and repair the U1746 code can vary widely based on the specific issue and the make and model of the vehicle. Typically, parts such as the Amplifier Module may range from $100 to $500, while labor costs can range from $80 to $150 per hour, depending on the shop and location. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. Overall, the total repair cost could range from $200 to $800, depending on the complexity of the repair and the parts needed.

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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.

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