AutoCodes – Generic – P1A26

P1A26 Code - Hybrid Battery 1 Voltage Low

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: P1A26 indicates Hybrid Battery 1 Voltage Low.
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 3,982

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 P1A26 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 P1A26 - Hybrid Battery 1 Voltage Low - AutoCodes.com — P1A26 Code - Hybrid Battery 1 Voltage Low

What does this mean?

What are the Possible Causes of the DTC P1A26?

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 P1A26?

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 P1A26 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 Help with the Code?

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Information for Specific Makes

P1A26 Buick — Hybrid Battery 1 Voltage Low
P1A26 Cadillac — Hybrid Battery 1 Voltage Low
P1A26 Chevrolet — Hybrid Battery 1 Voltage Low
P1A26 GMC — Hybrid Battery 1 Voltage Low
P1A26 Saturn — Hybrid Battery 1 Voltage Low

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 P1A26 Code

1. What are the common symptoms of OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

The common symptoms of OBDII code P1A26 include decreased hybrid system performance, reduced fuel efficiency, and potential illumination of the hybrid system warning light.

2. What are the possible causes of OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

The possible causes of code P1A26 include a weak or failing hybrid battery, poor battery connections, damaged battery cells, or issues with the hybrid battery management system.

3. How can I diagnose OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

Diagnosing code P1A26 typically involves using a professional diagnostic scanner to retrieve the code, checking the hybrid battery voltage levels, inspecting battery connections for corrosion or damage, and conducting a battery load test.

4. Can I continue driving my vehicle with OBDII code P1A26 (Hybrid Battery 1 Voltage Low) present?

It is not recommended to continue driving your vehicle with code P1A26 present, as it can lead to further damage to the hybrid battery and potentially cause the vehicle to stall or lose power unexpectedly.

5. How can I repair OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

Repairing code P1A26 may involve replacing the hybrid battery, repairing or cleaning battery connections, resetting the battery management system, or addressing any underlying issues that caused the low voltage condition.

6. Is it safe to reset the OBDII code P1A26 (Hybrid Battery 1 Voltage Low) on my own?

While you can attempt to clear the code using a diagnostic scanner, it is important to address the root cause of the low voltage condition to prevent the code from reoccurring and potentially causing further damage to the hybrid system.

7. How much does it typically cost to repair OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

The cost of repairing code P1A26 can vary depending on the underlying issue, the extent of the damage, and whether the hybrid battery needs to be replaced. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can extreme weather conditions affect OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

Extreme weather conditions, such as extreme heat or cold, can impact the performance and health of the hybrid battery, potentially leading to a low voltage condition and triggering code P1A26.

9. How often should I have my hybrid battery inspected to prevent OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

It is recommended to have your hybrid battery inspected regularly as part of routine maintenance to detect any potential issues early and prevent code P1A26 from occurring due to a low voltage condition.

10. Are there any preventive measures I can take to avoid OBDII code P1A26 (Hybrid Battery 1 Voltage Low)?

To help prevent code P1A26, you can drive your vehicle regularly to keep the hybrid battery charged, avoid deep discharges of the battery, keep battery connections clean and secure, and follow the manufacturer's maintenance recommendations for your hybrid vehicle.