AutoCodes – Cadillac – P1179 Cadillac

P1179 Cadillac Code - Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit

Quick Answer

The Fuel Pump Power Control Module is in constant communication with the Engine Control Module (ECM) regarding the operating state of the fuel pump power control system. Common causes include Faulty Fuel Pump Power Control Module, Fuel Pump Power Control Module harness is open or shorted, Fuel Pump Power Control 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
P1179 Cadillac indicates Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit.
Common causes
Common causes include Faulty Fuel Pump Power Control Module, Fuel Pump Power Control Module harness is open or shorted, Fuel Pump Power Control 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.
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Code Popularity 376
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 24, 2021
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Code P1179 Cadillac Description

The Fuel Pump Power Control Module is in constant communication with the Engine Control Module (ECM) regarding the operating state of the fuel pump power control system. Serial data messages are sent in a continuously repeating series of rolling counts with associated password protect samples. Each count/sample is assigned a value. When the ECM determines there is an error in the fuel pump control module fuel level sensor internal supply circuit, the ECM sets Diagnostic Trouble Code (DTC) P1179.
OBDII Code P1179 Cadillac - Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit - AutoCodes.com
P1179 Cadillac Code - Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit

What are the Possible Causes of the DTC P1179 Cadillac?

  • Faulty Fuel Pump Power Control Module
  • Fuel Pump Power Control Module harness is open or shorted
  • Fuel Pump Power Control Module circuit poor electrical connection

How to Fix the DTC P1179 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 P1179 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 P1179 Cadillac code?

Need more information on how to fix the P1179 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1179 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 P1179 Cadillac Code

1. What are the common symptoms of OBDII code P1179 in a Cadillac related to the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

The common symptoms include engine stalling, rough idling, hesitation during acceleration, and a decrease in fuel efficiency.

2. What are the possible causes of OBDII code P1179 in a Cadillac indicating an issue with the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

Potential causes include a faulty fuel pump driver control module, damaged wiring or connectors, a malfunctioning fuel pump, or a defective sensor.

3. How can I diagnose OBDII code P1179 in a Cadillac linked to the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the fuel pump driver control module and related components for damage, and testing the sensor's functionality.

4. What steps can I take to repair OBDII code P1179 on a Cadillac with issues in the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

Repair options may include replacing the fuel pump driver control module, repairing or replacing damaged wiring or connectors, fixing the fuel pump, or replacing the sensor if necessary.

5. Is it safe to continue driving a Cadillac with OBDII code P1179 indicating a problem with the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

It is not recommended to drive the vehicle with this code present, as it can lead to engine performance issues and potential fuel delivery problems that may result in further damage.

6. Can I reset OBDII code P1179 in a Cadillac related to the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is important to diagnose and address the underlying issue causing the code to prevent it from reoccurring.

7. How much does it typically cost to repair OBDII code P1179 in a Cadillac associated with the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

The cost of repairs can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast without professional automotive experience repair OBDII code P1179 on a Cadillac related to the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

While some basic repairs like checking wiring connections can be done by DIYers, diagnosing and repairing complex issues with the fuel pump driver control module or sensor may require professional assistance.

9. How urgent is it to address OBDII code P1179 in a Cadillac concerning the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

It is recommended to address this code promptly to prevent potential engine performance issues, fuel delivery problems, and further damage to the vehicle's components.

10. Can extreme weather conditions affect OBDII code P1179 in a Cadillac related to the Fuel Pump Driver Control Module Sensor 2 Internal Supply Circuit?

Extreme weather conditions, particularly extreme heat or cold, can impact the performance of the fuel pump driver control module, sensor, or associated components, potentially triggering this OBDII code.

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