AutoCodes – Mercury – P1A39 Mercury

P1A39 Mercury Code - Hybrid/EV Battery Temperature Sensor System Multiple Sensor Correlation

Quick Answer

The Engine Control Module (ECM) monitors the Hybrid/EV Battery Temperature Sensor. Common causes include Faulty Hybrid/EV Battery Temperature Sensor, Hybrid/EV Battery Temperature Sensor harness is open or shorted, Hybrid/EV Battery Temperature Sensor 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: P1A39 Mercury indicates Hybrid/EV Battery Temperature Sensor System Multiple Sensor Correlation.
Common causes: Common causes include Faulty Hybrid/EV Battery Temperature Sensor, Hybrid/EV Battery Temperature Sensor harness is open or shorted, Hybrid/EV Battery Temperature Sensor 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 855

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 Feb 16, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A39 Mercury Description

The Engine Control Module (ECM) monitors the Hybrid/EV Battery Temperature Sensor. The ECM sets the OBDII code when the Hybrid/EV Battery Temperature Sensor is not to factory specifications.

OBDII Code P1A39 Mercury - Hybrid/EV Battery Temperature Sensor System Multiple Sensor Correlation - AutoCodes.com — P1A39 Mercury Code - Hybrid/EV Battery Temperature Sensor System Multiple Sensor Correlation

What does this mean?

What are the Possible Causes of the DTC P1A39 Mercury?

Faulty Hybrid/EV Battery Temperature Sensor
Hybrid/EV Battery Temperature Sensor harness is open or shorted
Hybrid/EV Battery Temperature Sensor circuit poor electrical connection

How to Fix the DTC P1A39 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 P1A39 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 P1A39 Mercury code?

Need more information on how to fix the P1A39 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A39 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 P1A39 Mercury Code

1. What are the common symptoms of OBDII code P1A39 in a Mercury Hybrid/EV?

- Common symptoms include the illumination of the check engine light, reduced fuel efficiency, and potential issues with the hybrid/EV battery system.

2. What causes the OBDII code P1A39 to appear in a Mercury Hybrid/EV?

- This code typically indicates a problem with the correlation between multiple temperature sensors in the hybrid/EV battery system, which could be caused by sensor malfunctions, wiring issues, or software glitches.

3. How can I diagnose the OBDII code P1A39 in my Mercury Hybrid/EV?

- Diagnosis involves using a scan tool to read the code, checking the temperature sensor readings, inspecting the sensor wiring for damage, and verifying the software calibration of the sensors.

4. Can I continue driving my Mercury with the OBDII code P1A39 present?

- It is not recommended to drive with this code active, as it can lead to further damage to the hybrid/EV system and potentially affect the vehicle's performance and safety.

5. What are some possible repair tips for fixing OBDII code P1A39 in a Mercury Hybrid/EV?

- Repair tips may include replacing faulty temperature sensors, repairing damaged wiring, updating software/firmware as needed, and clearing the code to see if the issue reoccurs.

6. How critical is it to address the OBDII code P1A39 in a Mercury Hybrid/EV promptly?

- It is important to address this code promptly to prevent potential damage to the hybrid/EV battery system and ensure the vehicle operates efficiently and safely.

7. Can I reset the OBDII code P1A39 in my Mercury Hybrid/EV without fixing the underlying issue?

- While you can clear the code with a scan tool, it is crucial to address the underlying problem causing the code to prevent it from reoccurring and potentially causing more significant issues.

8. Are there any recalls or service bulletins related to the OBDII code P1A39 in Mercury Hybrid/EVs?

- Check with your local Mercury dealership or the manufacturer's website for any recalls or service bulletins related to this specific OBDII code to see if there are any known issues or remedies.

9. How can I prevent the OBDII code P1A39 from appearing in my Mercury Hybrid/EV in the future?

- Regular maintenance, such as checking the battery temperature sensors during service intervals, keeping the hybrid/EV system in good condition, and addressing any warning lights promptly, can help prevent this code from appearing.