AutoCodes – Cadillac – P0702 Cadillac

P0702 Cadillac Code - Transaxle Control System Low Voltage

Quick Answer

Each transaxle solenoid (TCC, pressure control, shift 2, shift 3, and shift 4) ground is controlled independently by the Powertrain Control Module (PCM). Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain 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: P0702 Cadillac indicates Transaxle Control System Low Voltage.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain 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 406

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 May 23, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0702 Cadillac Description

Each transaxle solenoid (TCC, pressure control, shift 2, shift 3, and shift 4) ground is controlled independently by the Powertrain Control Module (PCM). However, the PCM also controls ignition voltage simultaneously to all 5 solenoids whenever the fuel pump relay is commanded on. The Diagnostic Trouble Code (DTC) P0702 sets when the PCM detects low feedback voltage to all 5 solenoids when the engine is running, and the fuel pump relay is commanded on.

OBDII Code P0702 Cadillac - Transaxle Control System Low Voltage - AutoCodes.com — P0702 Cadillac Code - Transaxle Control System Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0702 Cadillac?

Faulty Powertrain Control Module (PCM)
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection

How to Fix the DTC P0702 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 P0702 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 P0702 Cadillac Code

1. What are the common symptoms of OBDII code P0702 in a Cadillac related to the Transaxle Control System Low Voltage?

- Common symptoms include issues with shifting gears, erratic transmission behavior, and the transmission going into limp mode.

2. What are the possible causes of OBDII code P0702 in a Cadillac?

- The code P0702 can be triggered by a faulty transmission control module (TCM), damaged wiring or connectors, low battery voltage, or a failing transaxle control module.

3. How can I diagnose OBDII code P0702 in my Cadillac?

- Diagnosing code P0702 involves using a diagnostic scanner to retrieve the trouble code, examining the transmission control module, checking the wiring and connectors for damage, and testing the battery voltage.

4. Can low battery voltage cause OBDII code P0702 in a Cadillac?

- Yes, low battery voltage can affect the proper functioning of the transaxle control system, leading to the triggering of code P0702.

5. How can I repair OBDII code P0702 in my Cadillac?

- Repairing code P0702 may involve replacing the transmission control module, repairing or replacing damaged wiring or connectors, ensuring the battery voltage is stable, and clearing the trouble code with a diagnostic scanner.

6. Is it safe to continue driving my Cadillac with OBDII code P0702 present?

- It is not recommended to continue driving your Cadillac with code P0702 present, as it can lead to further transmission issues and potential safety hazards.

7. Can a DIY enthusiast fix OBDII code P0702 in a Cadillac?

- While some aspects of diagnosing and repairing code P0702 can be done by a DIY enthusiast with the right tools and knowledge, it is recommended to consult a professional mechanic for proper diagnosis and repair.

8. Will resetting the trouble codes make OBDII code P0702 go away permanently?

- Simply resetting the trouble codes may temporarily clear code P0702, but if the underlying issue is not addressed, the code is likely to reappear.

9. How can I prevent OBDII code P0702 from occurring in my Cadillac in the future?

- Regular maintenance of your Cadillac's transmission system, checking the battery voltage, and addressing any warning signs promptly can help prevent the occurrence of code P0702 in the future.