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P0973 Cadillac Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Quick Answer

The P0973 diagnostic trouble code for Cadillac vehicles indicates an issue with the Shift Solenoid Valve 1 Control Circuit having low voltage. Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the control circuit, Transmission control module malfunction. 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
P0973 Cadillac indicates Shift Solenoid Valve 1 Control Circuit Low Voltage.
Common causes
Common causes include Faulty shift solenoid valve, Damaged wiring or connectors in the control circuit, Transmission control module malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0973 Cadillac Description

The P0973 diagnostic trouble code for Cadillac vehicles indicates an issue with the Shift Solenoid Valve 1 Control Circuit having low voltage. The shift solenoid valve is a critical component of the transmission system that helps regulate the flow of transmission fluid to control gear shifting. In this case, a low voltage signal is being detected by the vehicle's onboard computer, signaling a problem with the solenoid valve's control circuit.

OBDII Code P0973 Cadillac - Shift Solenoid Valve 1 Control Circuit Low Voltage
P0973 Cadillac Code - Shift Solenoid Valve 1 Control Circuit Low Voltage

Common Causes of P0973 Cadillac

  1. Faulty shift solenoid valve
  2. Damaged wiring or connectors in the control circuit
  3. Transmission control module malfunction
  4. Low transmission fluid levels
  5. Electrical issues in the transmission system

Symptoms of P0973 Cadillac

  1. Erratic or delayed gear shifting
  2. Poor acceleration
  3. Reduced fuel efficiency
  4. Illuminated Check Engine Light
  5. Transmission slipping

How to Fix P0973 Cadillac

  1. Diagnose the issue by using a scan tool to retrieve the trouble code and perform a visual inspection of the shift solenoid valve and control circuit.
  2. Test the shift solenoid valve for proper operation and check for any wiring or connector damage.
  3. Replace the shift solenoid valve if it is found to be faulty.
  4. Repair or replace any damaged wiring or connectors in the control circuit.
  5. Clear the trouble code and test drive the vehicle to ensure proper gear shifting functionality.

Cost to Fix P0973 Cadillac

The cost of repairing a P0973 Shift Solenoid Valve 1 Control Circuit Low Voltage code can vary depending on the specific cause of the issue and the labor rates of the auto repair shop. On average, the cost of replacing a shift solenoid valve can range from $150 to $300, while addressing wiring or connector issues may cost around $100 to $200. Overall, including parts and labor, the total repair cost for this issue may fall in the range of $300 to $600. However, it is advisable to check with local auto repair shops for a more accurate cost estimate based on your vehicle's make and model. Keep in mind that additional diagnostic time and labor costs may apply.

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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 P0973 Cadillac Code

1. What are the common symptoms of OBDII code P0973 in a Cadillac?

The common symptoms of OBDII code P0973 (Shift Solenoid Valve 1 Control Circuit Low Voltage) in a Cadillac may include harsh shifting, delayed or erratic shifting, transmission slipping, and the transmission going into limp mode.

2. What can cause the OBDII code P0973 in a Cadillac?

The OBDII code P0973 in a Cadillac is typically caused by issues with the shift solenoid valve 1 control circuit, such as a faulty solenoid, damaged wiring, poor electrical connections, or a malfunctioning transmission control module.

3. How serious is the OBDII code P0973 in a Cadillac?

The OBDII code P0973 in a Cadillac can lead to drivability issues and potential damage to the transmission if left unresolved. It is recommended to address this code promptly to prevent further complications.

4. How can I diagnose the OBDII code P0973 in my Cadillac?

Diagnosing the OBDII code P0973 in a Cadillac involves using a diagnostic scanner to retrieve the trouble code, checking the shift solenoid valve 1 and its wiring for any visible damage, and testing the electrical connections for proper voltage and continuity.

5. Can I continue driving my Cadillac with the OBDII code P0973?

It is not recommended to continue driving your Cadillac with the OBDII code P0973, as it can result in transmission issues and potential safety hazards. It is advisable to address the underlying problem as soon as possible.

6. How can I repair the OBDII code P0973 in my Cadillac?

Repairing the OBDII code P0973 in a Cadillac involves replacing the faulty shift solenoid valve 1, repairing any damaged wiring or connectors, and clearing the trouble code with a diagnostic scanner. It is also recommended to test drive the vehicle to ensure the issue has been resolved.

7. Is it possible to prevent the OBDII code P0973 from occurring in my Cadillac?

While some causes of the OBDII code P0973 may be related to normal wear and tear, regular maintenance of the transmission system, including fluid changes and inspections, can help prevent this code from occurring.

8. How much does it cost to fix the OBDII code P0973 in a Cadillac?

The cost to fix the OBDII code P0973 in a Cadillac can vary depending on the extent of the issue, the parts needed for repair, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast repair the OBDII code P0973 in a Cadillac?

While some DIY enthusiasts may have the skills and tools to address the OBDII code P0973 in a Cadillac, it is a complex issue that may require specialized knowledge and equipment. It is advisable to seek professional help if unsure.

10. How long does it take to fix the OBDII code P0973 in a Cadillac?

The time it takes to fix the OBDII code P0973 in a Cadillac can vary depending on the specific cause of the issue, the availability of parts, and the expertise of the mechanic. In general, it may take a few hours to a full day to complete the repair.

Discuss the causes and fixes for P0973 Cadillac OBDII Code

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  • Had a PO973 code on a 2004 Cadillac SRX. It wouldn't shift out of gear. Once you let it parked for a while It drove fine and shifted fine. It happened twice. Trans fluid had been changed at 100,000 miles. I then changed all three shift solenoids with filter and fluid and noticed a definite change in shifting to the better. Vehicle has 155,000 miles on it, and shifts solid and easily between gears now. hopefully no other damage.
    Shift solenoids are getting hard to find at the GM dealers and I had to pay a premium price to get these but knowing that they were made for that transmission was why I didn't got for an after market parts company. I hate doing things twice. Just some advice from a person who had a code PO973.

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