AutoCodes – Mercury – U0237 Mercury

U0237 Mercury Code - Lost Communication With Digital Audio Control Module 'C'

Quick Answer

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Common causes include Faulty Digital Audio Control Module 'C', Digital Audio Control Module 'C' harness is open or shorted, Digital Audio Control Module 'C' 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: U0237 Mercury indicates Lost Communication With Digital Audio Control Module 'C'.
Common causes: Common causes include Faulty Digital Audio Control Module 'C', Digital Audio Control Module 'C' harness is open or shorted, Digital Audio Control Module 'C' 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 404

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 Apr 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0237 Mercury Description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. CAN bus uses two dedicated wires for communication. The wires are called CAN high and CAN low. When the CAN bus is in idle mode, both lines carry 2.5V. When data bits are being transmitted, the CAN high line goes to 3.75V, and the CAN low drops to 1.25V, thereby generating a 2.5V differential between the lines. Since communication relies on a voltage differential between the two bus lines, the CAN bus is NOT sensitive to inductive spikes, electrical fields, or other noise. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Digital Audio Control Module 'C' has not been received.

OBDII Code U0237 Mercury - Lost Communication With Digital Audio Control Module 'C' - AutoCodes.com — U0237 Mercury Code - Lost Communication With Digital Audio Control Module 'C'

What does this mean?

What are the Possible Causes of the DTC U0237 Mercury?

Faulty Digital Audio Control Module 'C'
Digital Audio Control Module 'C' harness is open or shorted
Digital Audio Control Module 'C' circuit poor electrical connection

How to Fix the DTC U0237 Mercury?

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 U0237 Mercury 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 U0237 Mercury Code

1. What are the common symptoms of OBDII code U0237 in a Mercury vehicle?

- Common symptoms include loss of audio functions, malfunctioning audio controls, and the inability to control audio settings.

2. What does the OBDII code U0237 indicating "Lost Communication With Digital Audio Control Module 'C'" mean?

- This code indicates a communication error between the vehicle's onboard computer system and the Digital Audio Control Module 'C'.

3. What are the possible causes of OBDII code U0237 in a Mercury vehicle?

- The possible causes include a faulty Digital Audio Control Module 'C', damaged wiring or connectors, software glitches, or issues with the vehicle's computer system.

4. How can I diagnose the OBDII code U0237 in my Mercury?

- Diagnosis typically involves checking the connections to the Digital Audio Control Module 'C', inspecting the module for physical damage, and using a diagnostic scanner to communicate with the module.

5. Can I still drive my Mercury with the OBDII code U0237 present?

- While it may be possible to drive the vehicle with this code, it is recommended to address the issue promptly to avoid potential audio system malfunctions or other related problems.

6. Is it safe to repair the OBDII code U0237 in my Mercury myself?

- Repairing this code may require advanced diagnostic tools and technical knowledge. It is advisable to consult a professional mechanic or dealership for accurate diagnosis and repair.

7. How much does it typically cost to fix the OBDII code U0237 in a Mercury?

- The cost of repairing this code can vary depending on the specific cause of the issue. It is recommended to obtain a diagnosis from a qualified technician to determine the exact cost.

8. Can resetting the vehicle's computer system clear the OBDII code U0237?

- In some cases, resetting the vehicle's computer system may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

9. Are there any preventive measures to avoid encountering the OBDII code U0237 in the future?

- Regular maintenance checks, including inspecting wiring connections and keeping software up to date, can help prevent communication errors and potential issues related to this code.

10. How urgent is it to address the OBDII code U0237 in a Mercury vehicle?

- While the vehicle may still be operable with this code, it is recommended to address it in a timely manner to avoid further complications and ensure the proper functioning of the audio system.