AutoCodes – Mercury – P0942 Mercury

P0942 Mercury Code - Hydraulic Pressure Unit

Quick Answer

The Transmission Control Module (TCM) is integrated into the mechatronic assembly. Common causes include Fault detected in Hydraulic Valve Body, Low transmission fluid level, Plugged Transmission filter. 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: P0942 Mercury indicates Hydraulic Pressure Unit.
Common causes: Common causes include Fault detected in Hydraulic Valve Body, Low transmission fluid level, Plugged Transmission filter.
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 2,001

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 Nov 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0942 Mercury Description

The Transmission Control Module (TCM) is integrated into the mechatronic assembly. If installing a new transaxle or mechatronic assembly, the TCM will need to be checked and recalibrated (reflashed) to the latest level calibration. Install a new mechatronic unit. If transmission fluid is contaminated, install a new transaxle.

OBDII Code P0942 Mercury - Hydraulic Pressure Unit - AutoCodes.com — P0942 Mercury Code - Hydraulic Pressure Unit

What does this mean?

What are the Possible Causes of the DTC P0942 Mercury?

Fault detected in Hydraulic Valve Body
Low transmission fluid level
Plugged Transmission filter
Faulty Transmission Oil Pump

How to Fix the DTC P0942 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 P0942 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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Need more information on how to fix the P0942 Mercury code? Get Access to Factory Service Manuals

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Get the P0942 Mercury code diagnosed by a professional: Find a repair shop in your area

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 P0942 Mercury Code

1. What are the common symptoms of OBDII code P0942 in a Mercury related to the Hydraulic Pressure Unit?

The common symptoms include harsh shifting or hesitation when changing gears, transmission slippage, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P0942 in a Mercury?

The code P0942 typically indicates a malfunction in the hydraulic pressure unit circuit, which could be caused by a faulty hydraulic pressure sensor, wiring issues, or a failing hydraulic pressure unit itself.

3. How serious is OBDII code P0942 in a Mercury?

Ignoring OBDII code P0942 can lead to transmission issues and potential damage, affecting the vehicle's drivability and safety. It is recommended to address this code promptly to prevent further problems.

4. Can I drive my Mercury with OBDII code P0942?

It is not advisable to drive your Mercury with OBDII code P0942, as it can result in transmission problems and potentially lead to more expensive repairs. It's best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code P0942 in my Mercury?

Diagnosing OBDII code P0942 typically involves using a diagnostic scanner to retrieve the code, checking the hydraulic pressure unit circuit for faults, inspecting the sensor and wiring, and testing the hydraulic pressure unit's functionality.

6. Is it possible to repair OBDII code P0942 in a Mercury by myself?

Repairing OBDII code P0942 may require specialized tools and knowledge of automotive systems. Unless you are experienced in diagnosing and repairing transmission-related issues, it is recommended to seek the assistance of a qualified mechanic.

7. How much does it cost to fix OBDII code P0942 in a Mercury?

The cost of repairing OBDII code P0942 in a Mercury can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates in your area. It is advisable to obtain quotes from local repair shops for an accurate estimate.

8. Can resetting the OBDII code P0942 in my Mercury make it go away permanently?

Resetting the OBDII code P0942 may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem for a permanent solution.

9. Are there any preventive maintenance tips to avoid OBDII code P0942 in my Mercury?

Regularly servicing your vehicle, including checking the transmission fluid level and quality, can help prevent issues that may trigger OBDII code P0942. Addressing any transmission-related symptoms promptly can also help avoid more significant problems.

10. How long does it take to repair OBDII code P0942 in a Mercury?

The repair time for OBDII code P0942 in a Mercury can vary depending on the specific cause of the issue and the complexity of the repair. It is best to consult with a professional mechanic to get an accurate estimate of the repair timeline.