AutoCodes – Saturn – P1A31 Saturn

P1A31 Saturn Code - Hybrid Battery 3 Circuit High 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: P1A31 Saturn indicates Hybrid Battery 3 Circuit High 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 1,203

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 P1A31 Saturn 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 P1A31 Saturn - Hybrid Battery 3 Circuit High Voltage - AutoCodes.com — P1A31 Saturn Code - Hybrid Battery 3 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1A31 Saturn?

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 P1A31 Saturn?

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 P1A31 Saturn 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.

Need more information about the P1A31 Saturn code?

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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 P1A31 Saturn Code

1. What are the common symptoms of OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

The common symptoms include reduced fuel efficiency, poor acceleration, illuminated check engine light, and potential issues with the hybrid system.

2. What are the possible causes of OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

The code P1A31 may be triggered by a faulty hybrid battery, issues with the high voltage circuit, damaged wiring, or a malfunctioning battery control module.

3. How can I diagnose the OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

Diagnosing this code typically involves using a scan tool to read the code, checking the hybrid battery voltage, inspecting the wiring for damage, and testing the battery control module.

4. Can I drive my Saturn with the OBDII code P1A31 Hybrid Battery 3 Circuit High Voltage?

It is not recommended to drive your Saturn with this code as it can lead to further damage to the hybrid system. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I repair OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

Repairing this code may involve replacing the hybrid battery, repairing or replacing damaged wiring, resetting the battery control module, or addressing any other underlying issues causing the high voltage circuit problem.

6. Is it safe to attempt DIY repairs for OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

Due to the high voltage nature of hybrid systems, it is recommended to seek professional assistance for diagnosing and repairing this code to ensure safety and proper resolution of the issue.

7. What are the long-term effects of ignoring the OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

Ignoring this code can lead to further damage to the hybrid system, decreased fuel efficiency, potential safety hazards, and ultimately more costly repairs in the future.

8. Can extreme weather conditions affect the triggering of OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

Extreme weather conditions, especially extreme heat, can potentially exacerbate issues related to the hybrid battery and high voltage circuit, leading to the triggering of this code.

9. How much does it typically cost to repair OBDII code P1A31 Saturn Hybrid Battery 3 Circuit High Voltage?

The cost of repairing this code can vary depending on the specific underlying issue, parts needed for replacement, labor costs, and whether the repair is done at a dealership or an independent mechanic.

10. How often should I have my Saturn's hybrid system inspected to prevent OBDII code P1A31 Hybrid Battery 3 Circuit High Voltage?

It is recommended to have your Saturn's hybrid system inspected regularly as part of routine maintenance to detect any potential issues early and prevent the triggering of codes like P1A31 related to the high voltage circuit.