AutoCodes – Cadillac – P1A73 Cadillac

P1A73 Cadillac Code - 14 Volt Power Module Temperature Sensor 2 Circuit High Voltage

Quick Answer

The 14 V 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 Temperature Sensor 2, 14 Volt Power Module Temperature Sensor 2 harness is open or shorted, 14 Volt Power Module Temperature Sensor 2 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: P1A73 Cadillac indicates 14 Volt Power Module Temperature Sensor 2 Circuit High Voltage.
Common causes: Common causes include Faulty 14 Volt Power Module Temperature Sensor 2, 14 Volt Power Module Temperature Sensor 2 harness is open or shorted, 14 Volt Power Module Temperature Sensor 2 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 905

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 21, 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 P1A73 Cadillac Description

The 14 V 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 accessory DC power control module and are not serviced separately from the control module.

OBDII Code P1A73 Cadillac - 14 Volt Power Module Temperature Sensor 2 Circuit High Voltage - AutoCodes.com — P1A73 Cadillac Code - 14 Volt Power Module Temperature Sensor 2 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P1A73 Cadillac?

Faulty 14 Volt Power Module Temperature Sensor 2
14 Volt Power Module Temperature Sensor 2 harness is open or shorted
14 Volt Power Module Temperature Sensor 2 circuit poor electrical connection

How to Fix the DTC P1A73 Cadillac?

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 P1A73 Cadillac 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 P1A73 Cadillac code?

Need more information on how to fix the P1A73 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1A73 Cadillac 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 P1A73 Cadillac Code

1. What does the OBDII code P1A73 mean on a Cadillac?

P1A73 indicates an issue with the 14 Volt Power Module Temperature Sensor 2 Circuit, specifically detecting a high voltage condition.

2. What are the symptoms of the P1A73 code in a Cadillac?

Common symptoms include the check engine light turning on, reduced fuel efficiency, electrical system irregularities, and potential issues with charging or battery performance.

3. What causes the P1A73 code to appear?

Possible causes include a faulty 14 Volt Power Module Temperature Sensor, damaged wiring or connectors, or an issue with the 14 Volt Power Module itself.

4. How is the P1A73 code diagnosed in a Cadillac?

A technician will typically use a scan tool to confirm the code, inspect the wiring and connectors for damage, and test the temperature sensor and power module for proper functionality.

5. Can I drive my Cadillac with the P1A73 code?

Driving with this code is not recommended, as it can lead to electrical system failures or further damage to the 14 Volt Power Module.

6. How do you fix the P1A73 code on a Cadillac?

Repairs may include replacing the faulty temperature sensor, repairing damaged wiring or connectors, or replacing the 14 Volt Power Module if necessary.

7. What tools are needed to fix the P1A73 code?

Common tools include an OBDII scan tool for diagnostics, a multimeter for testing voltage, and basic hand tools for removing and replacing components.

8. How much does it cost to repair the P1A73 code?

Repair costs can vary, typically ranging from $100 to $500, depending on whether the issue is with the sensor, wiring, or the power module itself.

9. Can a weak battery cause the P1A73 code?

While a weak battery might not directly cause this code, it can contribute to electrical system issues that may trigger related problems.

10. Is the P1A73 code common in Cadillacs?

This code is less common but can occur in Cadillacs with advanced electrical systems, especially if the vehicle has aging components or wiring issues.