AutoCodes – Generic – P1A22

P1A22 Code - Hybrid Battery 1 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: P1A22 indicates Hybrid Battery 1 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 2,593

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 P1A22 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 P1A22 - Hybrid Battery 1 Circuit Low Voltage - AutoCodes.com — P1A22 Code - Hybrid Battery 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P1A22?

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 P1A22?

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 P1A22 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

P1A22 Buick — Hybrid Battery 1 Circuit Low Voltage
P1A22 Cadillac — Hybrid Battery 1 Circuit Low Voltage
P1A22 Chevrolet — Hybrid Battery 1 Circuit Low Voltage
P1A22 GMC — Hybrid Battery 1 Circuit Low Voltage
P1A22 Saturn — Hybrid Battery 1 Circuit Low Voltage

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 P1A22 Code

1. What are the common symptoms of OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

The common symptoms of code P1A22 include poor fuel economy, reduced hybrid system performance, and the illumination of the hybrid system warning light on the dashboard.

2. What are the possible causes of OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

Possible causes of code P1A22 include a faulty hybrid battery, issues with the battery management system, poor electrical connections, or a charging system malfunction.

3. How can I diagnose OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

Diagnosing code P1A22 typically involves using a scan tool to retrieve the code, checking the hybrid battery voltage levels, inspecting the battery connections, and performing a thorough visual inspection of the battery system components.

4. Can I still drive my vehicle with OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

It is not recommended to drive your vehicle with code P1A22 present, as it can lead to further damage to the hybrid battery system and potentially affect the performance of the vehicle.

5. How serious is OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

Code P1A22 is considered a serious issue as it directly affects the hybrid system's performance and efficiency. Ignoring this code can lead to more significant problems with the hybrid battery system.

6. What are some repair tips for fixing OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

Repair tips for resolving code P1A22 may include checking and cleaning the battery terminals, testing the hybrid battery for proper voltage levels, inspecting the battery management system components, and addressing any charging system issues.

7. Can I reset OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage) by disconnecting the battery?

While disconnecting the battery may temporarily clear the code, it is not a recommended method to fix the underlying issue causing code P1A22. It is best to diagnose and repair the root cause of the problem.

8. How much does it typically cost to repair OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage)?

The cost of repairing code P1A22 can vary depending on the specific cause of the issue. Costs may range from a simple battery terminal cleaning to more complex repairs involving the hybrid battery or battery management system components.

9. Will OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage) cause my vehicle to fail an emissions test?

Yes, code P1A22 can potentially cause your vehicle to fail an emissions test, as it indicates a problem with the hybrid battery system that can impact the vehicle's overall emissions performance.

10. How can I prevent OBDII code P1A22 (Hybrid Battery 1 Circuit Low Voltage) from recurring?

To prevent the recurrence of code P1A22, it is essential to perform regular maintenance on the hybrid battery system, keep the battery terminals clean and secure, and address any electrical issues promptly to ensure optimal performance and reliability.