AutoCodes – Mercury – P2428 Mercury

P2428 Mercury Code - Exhaust Gas Temperature Too High Bank 1

Quick Answer

The Powertrain Control Module (PCM) monitors the Exhaust Gas Temperature (EGT) sensor for a biased signal value. Common causes include Faulty Exhaust Gas Temperature (EGT), Exhaust Gas Temperature (EGT) harness is open or shorted, Exhaust Gas Temperature (EGT) 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: P2428 Mercury indicates Exhaust Gas Temperature Too High Bank 1.
Common causes: Common causes include Faulty Exhaust Gas Temperature (EGT), Exhaust Gas Temperature (EGT) harness is open or shorted, Exhaust Gas Temperature (EGT) 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 1,391

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2428 Mercury Description

The Powertrain Control Module (PCM) monitors the Exhaust Gas Temperature (EGT) sensor for a biased signal value. Following an 8-hour soak, the PCM records the EGT sensor temperature value at key ON, engine OFF. After several minutes of vehicle operation at vehicle speeds greater than 40.2 km/h (25 mph) the PCM calculates an expected key ON, engine OFF value. The PCM determines what the expected EGT value at key ON, engine OFF should have been based on inputs from other sensors. The test fails when the difference between the expected calculated value and the actual recorded value is greater than 40°C (72°F).

OBDII Code P2428 Mercury - Exhaust Gas Temperature Too High Bank 1 - AutoCodes.com — P2428 Mercury Code - Exhaust Gas Temperature Too High Bank 1

What does this mean?

What are the Possible Causes of the DTC P2428 Mercury?

Faulty Exhaust Gas Temperature (EGT)
Exhaust Gas Temperature (EGT) harness is open or shorted
Exhaust Gas Temperature (EGT) circuit poor electrical connection
Extreme changes in ambient temperature soon after key ON, engine running

How to Fix the DTC P2428 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 P2428 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.

Need more information about the P2428 Mercury code?

Need more information on how to fix the P2428 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2428 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 P2428 Mercury Code

1. What are the common symptoms of OBDII code P2428 in a Mercury vehicle?

The common symptoms of OBDII code P2428 include the Check Engine Light illuminating on the dashboard, reduced engine power, and increased exhaust gas temperatures.

2. What are the possible causes of OBDII code P2428 in a Mercury vehicle?

Possible causes of OBDII code P2428 include a faulty exhaust gas temperature sensor, a problem with the exhaust system, a malfunctioning catalytic converter, or issues with the engine control module.

3. How serious is OBDII code P2428 in a Mercury vehicle?

OBDII code P2428 can lead to increased exhaust temperatures, reduced engine performance, and potential damage to the catalytic converter if left unaddressed. It is advisable to address this issue promptly.

4. How can I diagnose OBDII code P2428 in my Mercury vehicle?

Diagnosing OBDII code P2428 typically involves using an OBDII scanner to retrieve the code, inspecting the exhaust gas temperature sensor and related components, and conducting a thorough visual inspection of the exhaust system.

5. Can I continue driving my Mercury with OBDII code P2428?

It is not recommended to continue driving your Mercury with OBDII code P2428, as it can lead to potential engine damage and decreased performance. It is best to address the issue as soon as possible.

6. What are some repair tips for fixing OBDII code P2428 in a Mercury vehicle?

Repair tips for OBDII code P2428 may include replacing the faulty exhaust gas temperature sensor, inspecting and repairing any issues with the exhaust system, and ensuring proper functioning of the catalytic converter.

7. How much does it cost to repair OBDII code P2428 in a Mercury vehicle?

The cost of repairing OBDII code P2428 in a Mercury vehicle can vary depending on the specific cause of the issue, the parts needed for repair, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast fix OBDII code P2428 in a Mercury vehicle?

While some experienced DIY enthusiasts may be able to address OBDII code P2428 on their own, it is recommended to consult with a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

9. Is it necessary to reset the OBDII code P2428 after repairs in a Mercury vehicle?

After repairs have been made to address OBDII code P2428 in a Mercury vehicle, it is important to reset the code using an OBDII scanner to clear the Check Engine Light and ensure that the issue has been resolved.

10. How can I prevent OBDII code P2428 from occurring in my Mercury vehicle?

To prevent OBDII code P2428, it is recommended to perform regular maintenance on your vehicle, including inspecting the exhaust system, monitoring engine performance, and addressing any issues promptly to prevent potential problems.