AutoCodes – Cadillac – P179A Cadillac

P179A Cadillac Code - Auxiliary Transmission Fluid Pump Overspeed

Quick Answer

This diagnostic monitors the output speed of the high voltage motor. Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid Pump 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: P179A Cadillac indicates Auxiliary Transmission Fluid Pump Overspeed.
Common causes: Common causes include Faulty Auxiliary Transmission Fluid Pump, Auxiliary Transmission Fluid Pump harness is open or shorted, Auxiliary Transmission Fluid Pump 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 1,073

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 Jan 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P179A Cadillac Description

This diagnostic monitors the output speed of the high voltage motor. The absolute value of the sensed speed of the motor is compared against a threshold. If the sensed speed is above the fail threshold for sufficient time, the diagnostic will fail.

OBDII Code P179A Cadillac - Auxiliary Transmission Fluid Pump Overspeed - AutoCodes.com — P179A Cadillac Code - Auxiliary Transmission Fluid Pump Overspeed

What does this mean?

What are the Possible Causes of the DTC P179A Cadillac?

Faulty Auxiliary Transmission Fluid Pump
Auxiliary Transmission Fluid Pump harness is open or shorted
Auxiliary Transmission Fluid Pump circuit poor electrical connection

How to Fix the DTC P179A 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 P179A 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.

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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 P179A Cadillac Code

1. What are the common symptoms of OBDII code P179A Cadillac (Auxiliary Transmission Fluid Pump Overspeed)?

The common symptoms of this code may include transmission slipping, harsh shifting, decreased fuel efficiency, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code P179A Cadillac?

Possible causes of this code include a faulty auxiliary transmission fluid pump, low transmission fluid levels, a clogged transmission filter, or electrical issues in the transmission system.

3. How serious is OBDII code P179A Cadillac?

This code should be taken seriously as it can lead to further damage to the transmission system if left unresolved. It is recommended to address the issue promptly to avoid potential costly repairs.

4. How can I diagnose OBDII code P179A Cadillac?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the code, inspecting the transmission fluid level and condition, checking for any visible leaks, and testing the auxiliary transmission fluid pump.

5. Can I continue driving with OBDII code P179A Cadillac?

It is not recommended to continue driving with this code present, as it may cause further damage to the transmission system. It is best to address the issue as soon as possible.

6. How can OBDII code P179A Cadillac be repaired?

Repairing this code may involve replacing the faulty auxiliary transmission fluid pump, ensuring the transmission fluid is at the correct level and in good condition, clearing the code, and performing a test drive to confirm the issue is resolved.

7. Are there any DIY repair tips for OBDII code P179A Cadillac?

While some basic inspections can be done by DIY enthusiasts, resolving this code may require specialized tools and expertise. It is recommended to consult a qualified mechanic for proper diagnosis and repair.

8. Can a faulty transmission filter cause OBDII code P179A Cadillac?

Yes, a clogged or dirty transmission filter can impede the flow of transmission fluid, leading to issues with the auxiliary transmission fluid pump and triggering this OBDII code.

9. How much does it cost to repair OBDII code P179A Cadillac?

The cost of repairing this code can vary depending on the extent of the damage, the cost of parts, and labor rates. It is advisable to obtain quotes from reputable repair shops for an accurate estimate.

10. Is OBDII code P179A Cadillac a common issue in Cadillac vehicles?

While not extremely common, this code can occur in Cadillac vehicles, especially in models equipped with auxiliary transmission fluid pumps. Regular maintenance and prompt attention to transmission issues can help prevent this code from appearing.