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P1792 Cadillac Code - ECM to TCM Engine Coolant Signal

Quick Answer

The P1792 code in a Cadillac indicates a communication error between the Engine Control Module (ECM) and the Transmission Control Module (TCM) related to the engine coolant signal. Common causes include Faulty engine coolant temperature sensor, Wiring issues between ECM and TCM, Malfunctioning ECM or TCM. 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
P1792 Cadillac indicates ECM to TCM Engine Coolant Signal.
Common causes
Common causes include Faulty engine coolant temperature sensor, Wiring issues between ECM and TCM, Malfunctioning ECM or TCM.
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 09, 2024
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Code P1792 Cadillac Description

The P1792 code in a Cadillac indicates a communication error between the Engine Control Module (ECM) and the Transmission Control Module (TCM) related to the engine coolant signal. The ECM and TCM work together to ensure smooth operation of the vehicle by sharing important data, including engine coolant temperature. When this communication is disrupted, it can lead to various issues affecting the vehicle's performance.

OBDII Code P1792 Cadillac - ECM to TCM Engine Coolant Signal
P1792 Cadillac Code - ECM to TCM Engine Coolant Signal

Common Causes of P1792 Cadillac

  1. Faulty engine coolant temperature sensor
  2. Wiring issues between ECM and TCM
  3. Malfunctioning ECM or TCM
  4. Software glitch in ECM or TCM
  5. Low coolant levels or coolant leaks

Symptoms of P1792 Cadillac

  1. Check Engine Light illuminated
  2. Erratic shifting or transmission slipping
  3. Engine overheating
  4. Reduced fuel efficiency
  5. Engine stalling or rough idling

How to Fix P1792 Cadillac

  1. Use a diagnostic scanner to retrieve and clear the trouble code.
  2. Inspect the coolant temperature sensor and wiring for any damage or corrosion.
  3. Test the ECM and TCM for proper functionality and communication.
  4. Replace the coolant temperature sensor if faulty.
  5. Repair any wiring issues and reprogram the ECM and TCM if necessary.

Cost to Fix P1792 Cadillac

The cost to repair the ECM to TCM Engine Coolant Signal issue can vary depending on the specific cause of the problem. In general, the repair costs for this type of issue can range from $200 to $500, including parts and labor. It's important to keep in mind that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to get a personalized estimate from a qualified mechanic.

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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.

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