AutoCodes – Chevrolet – P1A29 Chevrolet

P1A29 Chevrolet Code - Hybrid Battery 2 Circuit Low Voltage

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: P1A29 Chevrolet indicates Hybrid Battery 2 Circuit Low Voltage.
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 1,550

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 P1A29 Chevrolet 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 P1A29 Chevrolet - Hybrid Battery 2 Circuit Low Voltage - AutoCodes.com — P1A29 Chevrolet Code - Hybrid Battery 2 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1A29 Chevrolet?

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 P1A29 Chevrolet?

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 P1A29 Chevrolet 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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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 P1A29 Chevrolet Code

1. What are the common symptoms of OBDII code P1A29 in a Chevrolet hybrid vehicle?

- Common symptoms include a decrease in fuel efficiency, reduced power output, and the illumination of the check engine light.

2. What can cause the OBDII code P1A29 "Hybrid Battery 2 Circuit Low Voltage" in a Chevrolet?

- This code is often triggered by issues such as a faulty hybrid battery, damaged wiring, or issues with the hybrid battery control module.

3. How serious is the OBDII code P1A29 in a Chevrolet hybrid vehicle?

- This code indicates a problem with the hybrid battery system, which can affect the vehicle's performance and fuel efficiency. It should be addressed promptly.

4. Can driving with the OBDII code P1A29 present cause further damage to the vehicle?

- Continuing to drive with this code present can potentially cause damage to the hybrid system components and may lead to further issues with the vehicle's operation.

5. How can I diagnose the OBDII code P1A29 in my Chevrolet hybrid vehicle?

- Proper diagnosis typically involves using a scan tool to retrieve the code, inspecting the hybrid battery system components, and testing the battery voltage and connections.

6. Is it possible to reset the OBDII code P1A29 in a Chevrolet without fixing the underlying issue?

- While clearing the code may temporarily turn off the check engine light, the issue causing the code will likely persist, and the code may reappear.

7. What are some DIY repair tips for addressing the OBDII code P1A29 in a Chevrolet?

- DIY repair tips may include checking and tightening battery connections, inspecting for damaged wiring, and ensuring the hybrid battery is functioning properly.

8. Can a professional mechanic help with diagnosing and repairing the OBDII code P1A29 in a Chevrolet hybrid vehicle?

- Yes, a qualified mechanic with experience in hybrid vehicles can accurately diagnose the issue, perform necessary repairs, and reset the code using specialized tools.

9. How much does it typically cost to repair the OBDII code P1A29 in a Chevrolet hybrid vehicle?

- Repair costs can vary depending on the specific issue causing the code, but they may range from a few hundred to over a thousand dollars, especially if parts need to be replaced.

10. Are there any preventive maintenance measures to help avoid the OBDII code P1A29 in a Chevrolet hybrid vehicle?

- Regularly inspecting the hybrid battery system, ensuring proper maintenance of the vehicle, and addressing any issues promptly can help prevent the occurrence of this code.