AutoCodes – Mercury – P2429 Mercury

P2429 Mercury Code - Exhaust Gas Temperature Too High Bank 2

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: P2429 Mercury indicates Exhaust Gas Temperature Too High Bank 2.
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 1,044

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 P2429 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 P2429 Mercury - Exhaust Gas Temperature Too High Bank 2 - AutoCodes.com — P2429 Mercury Code - Exhaust Gas Temperature Too High Bank 2

What does this mean?

What are the Possible Causes of the DTC P2429 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 P2429 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 P2429 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 P2429 Mercury Code

1. What are the common symptoms of OBDII code P2429 in a Mercury related to exhaust gas temperature too high on bank 2?

- Common symptoms include the illumination of the Check Engine Light, reduced engine performance, and potential exhaust system overheating.

2. What could be the possible causes triggering OBDII code P2429 in a Mercury?

- Potential causes include a faulty exhaust gas temperature sensor, issues with the exhaust system components, or problems with the engine control module.

3. How serious is OBDII code P2429 in a Mercury and should it be addressed immediately?

- This code should be addressed promptly to prevent potential damage to the exhaust system or engine components due to high exhaust gas temperatures.

4. Can driving with OBDII code P2429 in a Mercury cause further damage to the vehicle?

- Continuing to drive with this code may lead to increased exhaust system temperatures, potential catalyst damage, and reduced engine efficiency over time.

5. What are some DIY repair tips for OBDII code P2429 in a Mercury?

- DIY repair tips may include checking the exhaust gas temperature sensor for faults, inspecting the exhaust system for leaks or obstructions, and ensuring proper engine cooling.

6. How can a mechanic diagnose OBDII code P2429 in a Mercury?

- A mechanic may use a diagnostic scan tool to retrieve the code, inspect the exhaust system components, test the exhaust gas temperature sensor, and check for any related issues.

7. Is it possible to reset OBDII code P2429 in a Mercury without fixing the underlying issue?

- While clearing the code may temporarily turn off the Check Engine Light, the underlying issue causing the high exhaust gas temperature on bank 2 should be addressed to prevent future problems.

8. Are there any recalls or service bulletins related to OBDII code P2429 in Mercury vehicles?

- It's advisable to check with Mercury dealerships or online resources for any recalls or service bulletins specific to OBDII code P2429 to see if there are known issues or remedies.

9. How much can a typical repair for OBDII code P2429 in a Mercury cost?

- The cost of repair can vary depending on the underlying cause, but it may involve sensor replacement, exhaust system repairs, or addressing issues with the engine control module.

10. Can OBDII code P2429 in a Mercury be prevented through regular maintenance?

- Regular maintenance, such as keeping the exhaust system in good condition, monitoring engine performance, and promptly addressing any issues, can help prevent the occurrence of this code.