AutoCodes – Generic – P1A1C

P1A1C Code - Hybrid Battery 6 Temperature Sensor Performance

Quick Answer

The Battery Energy Control Module (BECM) monitors the hybrid battery pack temperature sensors to detect the failure of any sensor during a rationality check. Common causes include 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. 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: P1A1C indicates Hybrid Battery 6 Temperature Sensor Performance.
Common causes: Common causes include 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.
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 3,741

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 P1A1C Description

The Battery Energy Control Module (BECM) monitors the hybrid battery pack temperature sensors to detect the failure of any sensor during a rationality check.

OBDII Code P1A1C - Hybrid Battery 6 Temperature Sensor Performance - AutoCodes.com — P1A1C Code - Hybrid Battery 6 Temperature Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P1A1C?

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 P1A1C?

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 P1A1C 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 P1A1C code?

Need more information on how to fix the P1A1C code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A1C code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1A1C Buick — Hybrid Battery 6 Temperature Sensor Performance
P1A1C Cadillac — Hybrid Battery 6 Temperature Sensor Performance
P1A1C Chevrolet — Hybrid Battery 6 Temperature Sensor Performance
P1A1C GMC — Hybrid Battery 6 Temperature Sensor Performance
P1A1C Saturn — Hybrid Battery 6 Temperature Sensor Performance

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 P1A1C Code

1. What does the OBDII code P1A1C mean?

P1A1C indicates an issue with the performance of the Hybrid Battery 6 Temperature Sensor, which monitors the temperature of one section of the hybrid battery pack.

2. What are the common symptoms of the P1A1C code?

Symptoms may include an illuminated check engine light, reduced hybrid system performance, decreased fuel efficiency, or the hybrid system entering a fail-safe mode.

3. What causes the P1A1C code to appear?

This code is often triggered by a faulty temperature sensor, damaged wiring or connectors, a malfunctioning hybrid battery control module, or excessive heat buildup in the battery pack.

4. Can I drive my car with the P1A1C code?

Driving with this code is not recommended as it may lead to further damage to the hybrid battery system or reduced vehicle performance.

5. How is the P1A1C code diagnosed?

A technician will use a scan tool to verify the code, inspect the hybrid battery temperature sensor and wiring, and monitor temperature readings to identify abnormalities.

6. How do you fix the P1A1C code?

Repairs may involve replacing the faulty temperature sensor, repairing damaged wiring or connectors, or reprogramming/updating the hybrid battery control module.

7. How much does it cost to repair the P1A1C code?

The cost can vary widely depending on the specific repair needed, but sensor replacement typically ranges from $100 to $300, including parts and labor.

8. Can a dead hybrid battery cause the P1A1C code?

While a failing battery is not a direct cause of this code, excessive heat or other battery issues can contribute to sensor malfunctions.

9. Does resetting the code fix the problem?

Clearing the code without addressing the underlying issue will not resolve the problem and the code is likely to return.

10. How can I prevent the P1A1C code from recurring?

Ensure regular maintenance of the hybrid battery system, address overheating issues promptly, and inspect related wiring and sensors during routine service.