AutoCodes – Chevrolet – P0A02 Chevrolet

P0A02 Chevrolet Code - Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The Starter/Generator Control Module (SGCM) monitors its internal fluid temperature sensors to control the SGCM coolant pump and SGCM cooling fan. Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) 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: P0A02 Chevrolet indicates Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit Low Voltage.
Common causes: Common causes include Faulty Starter/Generator Control Module (SGCM), Starter/Generator Control Module (SGCM) harness is open or shorted, Starter/Generator Control Module (SGCM) 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 1,252

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Feb 22, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0A02 Chevrolet Description

The Starter/Generator Control Module (SGCM) monitors its internal fluid temperature sensors to control the SGCM coolant pump and SGCM cooling fan. The internal fluid temperature sensors of the SGCM are thermistors and are not serviceable. When the internal fluid temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the internal fluid temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The input parameters are not displayed on the scan tool.

OBDII Code P0A02 Chevrolet - Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com — P0A02 Chevrolet Code - Starter/Generator Control Module Coolant Temperature Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0A02 Chevrolet?

Faulty Starter/Generator Control Module (SGCM)
Starter/Generator Control Module (SGCM) harness is open or shorted
Starter/Generator Control Module (SGCM) circuit poor electrical connection

How to Fix the DTC P0A02 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 P0A02 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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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 P0A02 Chevrolet Code

What does the OBDII code P0A02 mean for a Chevrolet vehicle?

The OBDII code P0A02 indicates a low voltage issue in the starter/generator control module coolant temperature sensor 1 circuit, suggesting a potential problem with the sensor or its wiring.

What are the common symptoms of the P0A02 code?

Common symptoms may include warning lights on the dashboard, reduced engine performance, erratic engine behavior, or difficulty starting the vehicle.

What could cause the P0A02 code to trigger?

Potential causes include a faulty coolant temperature sensor, damaged wiring or connectors, a malfunctioning starter/generator control module, or issues with the vehicle's electrical system.

How can I diagnose the P0A02 code?

To diagnose the code, start by visually inspecting the coolant temperature sensor and its wiring for damage. Use a multimeter to check for proper voltage and continuity in the circuit.

What are some common repairs for the P0A02 code?

Common repairs may include replacing the coolant temperature sensor, repairing or replacing damaged wiring or connectors, or replacing the starter/generator control module if it's found to be faulty.

Can I drive my Chevrolet with the P0A02 code?

While it may be possible to drive the vehicle, it's not recommended as it could lead to further engine issues or damage if the problem is not addressed.

How much does it typically cost to fix the P0A02 code?

Repair costs can vary widely depending on the cause, but expect to pay anywhere from $100 to $600 or more, depending on whether you need to replace the sensor, wiring, or control module.

Is the P0A02 code serious?

Yes, the P0A02 code should be taken seriously, as it can affect the performance and reliability of your vehicle, potentially leading to more severe issues if left unresolved.

Do I need a professional mechanic to fix the P0A02 code?

While some experienced DIYers may handle the repairs, it is often best to consult a professional mechanic for accurate diagnosis and repair, especially if electrical issues are involved.