AutoCodes – Chevrolet – P1A90 Chevrolet

P1A90 Chevrolet Code - 14 Volt Power Module Temperature Sensor 1 Performance

Quick Answer

The 14V Power Module also called the accessory DC power control module, constantly monitors system temperature to protect against overheat conditions. Common causes include Faulty 14 Volt Power Module, 14 Volt Power Module harness is open or shorted, 14 Volt Power Module 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: P1A90 Chevrolet indicates 14 Volt Power Module Temperature Sensor 1 Performance.
Common causes: Common causes include Faulty 14 Volt Power Module, 14 Volt Power Module harness is open or shorted, 14 Volt Power Module 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 991

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 24, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1A90 Chevrolet Description

The 14V Power Module also called the accessory DC power control module, constantly monitors system temperature to protect against overheat conditions. The module also monitors the function of the temperature sensors. These sensors are internal to the 14 V power module and are not serviced separately from the control module.

OBDII Code P1A90 Chevrolet - 14 Volt Power Module Temperature Sensor 1 Performance - AutoCodes.com — P1A90 Chevrolet Code - 14 Volt Power Module Temperature Sensor 1 Performance

What does this mean?

What are the Possible Causes of the DTC P1A90 Chevrolet?

Faulty 14 Volt Power Module
14 Volt Power Module harness is open or shorted
14 Volt Power Module circuit poor electrical connection

How to Fix the DTC P1A90 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 P1A90 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.

Need more information about the P1A90 Chevrolet code?

Need more information on how to fix the P1A90 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A90 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 P1A90 Chevrolet Code

1. What does the OBDII code P1A90 mean for a Chevrolet?

The P1A90 code indicates a performance issue with the 14 Volt Power Module Temperature Sensor 1 in your Chevrolet, which monitors the module's temperature.

2. What are the common symptoms of a P1A90 code?

Symptoms may include an illuminated check engine light, reduced charging system performance, or possible warning messages related to the electrical system.

3. What causes the P1A90 code to appear?

Common causes include a defective temperature sensor, wiring issues like corrosion or damage, or a malfunction in the 14 Volt Power Module itself.

4. Can I drive my Chevrolet with a P1A90 code?

While the vehicle may still operate, driving with this code can result in reduced electrical system efficiency and may lead to further damage if left unresolved.

5. How do you diagnose the P1A90 code?

Diagnosis involves using a scan tool to confirm the code, inspecting the temperature sensor and related wiring, and testing the 14 Volt Power Module for proper operation.

6. What repairs are needed to fix the P1A90 code?

Repairs may include replacing the faulty temperature sensor, repairing damaged wiring, or replacing the 14 Volt Power Module if itâ€™s determined to be defective.

7. How much does it cost to repair the P1A90 code?

Repair costs vary but typically range from $100 to $500 depending on whether the temperature sensor or the 14 Volt Power Module needs replacement.

8. Can a software update fix the P1A90 code?

In some cases, a software update to the vehicleâ€™s control module might resolve the issue, but this is less common and depends on the specific vehicle and conditions.

9. How can I prevent a P1A90 code from occurring again?

Regular maintenance, including checking the electrical system and ensuring wiring is free of corrosion or damage, can help prevent recurrence.

10. Does the P1A90 code affect fuel efficiency?

Indirectly, yes. If the electrical system is not functioning optimally due to this issue, it may put extra strain on other components, potentially affecting fuel efficiency.