AutoCodes – GMC – P1A26 GMC

P1A26 GMC 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 GMC 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 1,196

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

What does this mean?

What are the Possible Causes of the DTC P1A26 GMC?

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 GMC?

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 GMC 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 P1A26 GMC Code

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

The common symptoms of this code may include a decrease in hybrid system performance, reduced fuel efficiency, and potential illumination of the hybrid system warning light on the dashboard.

2. What are some possible causes of OBDII code P1A26 GMC?

Potential causes of OBDII code P1A26 GMC (Hybrid Battery 1 Voltage Low) may include a failing hybrid battery pack, issues with the battery management system, faulty battery temperature sensors, or electrical system problems.

3. How can I diagnose the OBDII code P1A26 GMC?

Diagnosing OBDII code P1A26 GMC typically involves using a scan tool to retrieve the code and then performing further testing on the hybrid battery system, including checking battery voltage levels, inspecting battery connections, and testing the battery temperature sensors.

4. Is it safe to continue driving with OBDII code P1A26 GMC active?

It is not recommended to continue driving with OBDII code P1A26 GMC active, as it may lead to further damage to the hybrid battery system and potentially compromise the vehicle's overall performance and safety.

5. Can I repair OBDII code P1A26 GMC on my own?

Repairing OBDII code P1A26 GMC (Hybrid Battery 1 Voltage Low) may require specialized knowledge and tools related to hybrid vehicle systems. It is advisable to seek assistance from a qualified mechanic or hybrid vehicle specialist for proper diagnosis and repair.

6. How much does it typically cost to repair OBDII code P1A26 GMC?

The cost of repairing OBDII code P1A26 GMC can vary depending on the specific cause of the issue and the extent of the repairs needed. It is recommended to obtain estimates from reputable auto repair shops or dealerships for an accurate assessment.

7. Can a low hybrid battery voltage cause other problems in the vehicle?

Yes, a low hybrid battery voltage can potentially cause other problems in the vehicle, such as issues with starting the engine, reduced power output, and overall performance issues related to the hybrid system.

8. Are there any preventive measures to avoid OBDII code P1A26 GMC?

Regular maintenance of the hybrid battery system, including monitoring battery health, keeping the battery connections clean and secure, and following manufacturer recommendations for hybrid vehicle care, can help prevent issues leading to OBDII code P1A26 GMC.

9. How urgent is it to address OBDII code P1A26 GMC?

It is crucial to address OBDII code P1A26 GMC as soon as possible to prevent further damage to the hybrid battery system and ensure the safe operation of the vehicle. Ignoring the code may lead to more severe problems and potentially higher repair costs.

10. Can a DIY enthusiast attempt to reset OBDII code P1A26 GMC?

Resetting OBDII code P1A26 GMC without addressing the underlying issue may only temporarily clear the code without resolving the root cause. It is best to have the code properly diagnosed and repaired by a professional to ensure the problem is resolved effectively.