AutoCodes – Generic – P1A36

P1A36 Code - Hybrid Battery 3 Voltage High

Quick Answer

Battery voltage sensors allow the Energy Storage Control Module (ESCM) to monitor the voltage of the batteries in the Energy Storage Box (ESB). Common causes include Faulty Energy Storage Box (ESB) Battery, Faulty Battery Energy Control Module (BECM), Battery Energy Control Module (BECM) harness is open or shorted. 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: P1A36 indicates Hybrid Battery 3 Voltage High.
Common causes: Common causes include Faulty Energy Storage Box (ESB) Battery, Faulty Battery Energy Control Module (BECM), Battery Energy Control Module (BECM) harness is open or shorted.
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 1,109

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 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1A36 Description

Battery voltage sensors allow the Energy Storage Control Module (ESCM) to monitor the voltage of the batteries in the Energy Storage Box (ESB). The batteries apply voltage to internal input resistors that are connected to the signal circuits of the battery voltage sensors. The module provides ground to the battery voltage sensors through the reference circuit. The ESCM monitors the voltage drop across the battery voltage sensors and uses the inputs for hybrid calculations. When the battery voltage is high, the resistances of the sensors are high and the voltage signals are high. When the battery voltage is low, the resistances of the sensors are low and the voltage signals are low.

OBDII Code P1A36 - Hybrid Battery 3 Voltage High - AutoCodes.com — P1A36 Code - Hybrid Battery 3 Voltage High

What does this mean?

What are the Possible Causes of the DTC P1A36?

Faulty Energy Storage Box (ESB) Battery
Faulty Battery Energy Control Module (BECM)
Battery Energy Control Module (BECM) harness is open or shorted
Battery Energy Control Module (BECM) circuit poor electrical connection

How to Fix the DTC P1A36?

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 P1A36 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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Information for Specific Makes

P1A36 Buick — Hybrid Battery 3 Voltage High
P1A36 Cadillac — Hybrid Battery 3 Voltage High
P1A36 Chevrolet — Hybrid Battery 3 Voltage High
P1A36 GMC — Hybrid Battery 3 Voltage High
P1A36 Saturn — Hybrid Battery 3 Voltage High

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 P1A36 Code

1. What are the common symptoms of OBDII code P1A36 (Hybrid Battery 3 Voltage High)?

- The common symptoms include the hybrid system warning light illuminating on the dashboard, decreased fuel efficiency, and potential difficulty starting the vehicle.

2. What are the possible causes of OBDII code P1A36 indicating Hybrid Battery 3 Voltage High?

- The code can be triggered by issues such as a malfunctioning battery cell, faulty battery management system, or problems with the high-voltage wiring.

3. How can I diagnose the cause of OBDII code P1A36 related to Hybrid Battery 3 Voltage High?

- Diagnosis typically involves using a scan tool to check for specific battery voltage levels, inspecting the battery connections, and conducting tests to identify any faulty components.

4. Can driving with OBDII code P1A36 (Hybrid Battery 3 Voltage High) cause further damage to the vehicle?

- Continuing to drive with this code may lead to further damage to the hybrid battery system and potentially result in complete hybrid system failure, so it is best to address the issue promptly.

5. What are some repair tips for fixing OBDII code P1A36 associated with Hybrid Battery 3 Voltage High?

- Repair options may include replacing the faulty battery cell, repairing or recalibrating the battery management system, or addressing any wiring issues in the high-voltage system.

6. Is it safe to attempt DIY repairs for OBDII code P1A36 (Hybrid Battery 3 Voltage High)?

- Due to the high-voltage nature of hybrid systems, it is recommended to seek professional assistance or take the vehicle to a qualified technician for diagnosis and repairs to ensure safety.

7. How much does it typically cost to fix OBDII code P1A36 indicating Hybrid Battery 3 Voltage High?

- Repair costs can vary depending on the specific issue causing the code, but they may range from a few hundred to a few thousand dollars, especially if components like the hybrid battery need replacement.

8. Can resetting the OBDII code P1A36 (Hybrid Battery 3 Voltage High) on my own solve the issue?

- Simply resetting the code without addressing the underlying problem will not fix the issue, as the code will likely reappear once the problem persists. It is crucial to diagnose and fix the root cause.

9. How frequently does OBDII code P1A36 (Hybrid Battery 3 Voltage High) occur in hybrid vehicles?

- This code is relatively uncommon but may occur in hybrid vehicles experiencing issues with the hybrid battery system, making it essential to address the problem promptly to prevent further damage.

10. What steps should I take if OBDII code P1A36 (Hybrid Battery 3 Voltage High) keeps coming back after repairs?

- If the code persists after repairs, it indicates that the underlying issue has not been fully resolved. In such cases, further diagnosis by a professional is recommended to identify and address the root cause.