AutoCodes – Mercury – U0293 Mercury

U0293 Mercury Code - Lost Communication With Hybrid Powertrain Control Module

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 Hybrid Powertrain Control Module, Hybrid Powertrain Control Module harness is open or shorted, Hybrid Powertrain Control Module 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: U0293 Mercury indicates Lost Communication With Hybrid Powertrain Control Module.
Common causes: Common causes include Faulty Hybrid Powertrain Control Module, Hybrid Powertrain Control Module harness is open or shorted, Hybrid Powertrain Control Module 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 510

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 06, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0293 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 Hybrid Powertrain Control Module has not been received.

OBDII Code U0293 Mercury - Lost Communication With Hybrid Powertrain Control Module - AutoCodes.com — U0293 Mercury Code - Lost Communication With Hybrid Powertrain Control Module

What does this mean?

What are the Possible Causes of the DTC U0293 Mercury?

Faulty Hybrid Powertrain Control Module
Hybrid Powertrain Control Module harness is open or shorted
Hybrid Powertrain Control Module circuit poor electrical connection

How to Fix the DTC U0293 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 U0293 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 U0293 Mercury Code

1. What does the OBDII code U0293 mean for a Mercury vehicle?

The U0293 code indicates that the vehicle has lost communication with the Hybrid Powertrain Control Module (HPCM).

2. What are the common symptoms of the U0293 code in a Mercury vehicle?

Symptoms may include the check engine light turning on, reduced engine performance, failure to start, or hybrid system malfunctions.

3. What causes the U0293 code to appear in a Mercury?

Common causes include faulty wiring or connectors, a malfunctioning Hybrid Powertrain Control Module, or issues with the CAN (Controller Area Network) bus communication system.

4. Can I drive my Mercury with the U0293 code?

Driving with this code is not recommended, as it may result in reduced performance or further damage to the hybrid system.

5. How do I diagnose the U0293 code in a Mercury?

Diagnosis involves checking the CAN bus wiring, inspecting connectors for damage or corrosion, and testing the Hybrid Powertrain Control Module for proper operation.

6. How do I fix the U0293 trouble code?

Repairs may include replacing damaged wiring, cleaning or reconnecting corroded connectors, or replacing the Hybrid Powertrain Control Module if it is defective.

7. Can a dead or weak battery cause the U0293 code in a Mercury?

Yes, a weak or dead 12V battery or hybrid battery can cause communication issues and trigger the U0293 code.

8. What tools are needed to troubleshoot the U0293 code?

You'll need an OBDII scanner capable of reading manufacturer-specific codes, a multimeter for electrical testing, and potentially a wiring diagram for your Mercury.

9. Is the U0293 code specific to Mercury hybrid vehicles?

While the code is common in hybrid systems, it can appear in other vehicles with a Hybrid Powertrain Control Module or similar communication systems.

10. Can a software update fix the U0293 code in my Mercury?

In some cases, a software update for the Hybrid Powertrain Control Module may resolve communication issues, but this depends on the specific circumstances.