Engine-Codes.com
Engine-Codes – Cadillac – U1073 Cadillac

U1073 Cadillac Code - Invalid Or Missing Data For Engine Coolant

Quick Answer

The U1073 diagnostic trouble code for Cadillac vehicles indicates that there is invalid or missing data for engine coolant. Common causes include Faulty coolant temperature sensor, Wiring issues or loose connections in the coolant temperature sensor circuit, Low coolant levels. 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
U1073 Cadillac indicates Invalid Or Missing Data For Engine Coolant.
Common causes
Common causes include Faulty coolant temperature sensor, Wiring issues or loose connections in the coolant temperature sensor circuit, Low coolant levels.
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 16, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U1073 Cadillac Description

The U1073 diagnostic trouble code for Cadillac vehicles indicates that there is invalid or missing data for engine coolant. This means that the Engine Control Module (ECM) is not receiving the necessary information regarding the coolant temperature, which is crucial for the engine's performance and overall operation. The engine coolant temperature is a critical parameter that helps the ECM make adjustments to fuel delivery, ignition timing, and other engine functions to ensure optimal performance and efficiency.

OBDII Code U1073 Cadillac - Invalid Or Missing Data For Engine Coolant
U1073 Cadillac Code - Invalid Or Missing Data For Engine Coolant

Common Causes of U1073 Cadillac

  1. Faulty coolant temperature sensor
  2. Wiring issues or loose connections in the coolant temperature sensor circuit
  3. Low coolant levels
  4. Cooling system leaks
  5. ECM software or hardware malfunction

Symptoms of U1073 Cadillac

  1. Engine overheating
  2. Poor fuel efficiency
  3. Rough idling
  4. Stalling
  5. Check Engine Light illuminated

How to Fix U1073 Cadillac

  1. Begin by checking the coolant level in the radiator and topping it off if necessary.
  2. Inspect the coolant temperature sensor and its wiring for any damage or corrosion. Replace the sensor if needed.
  3. Check for any leaks in the cooling system and repair them accordingly.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool and monitor the coolant temperature data to ensure it is now being properly received.
  5. If the issue persists, further diagnostics may be required to pinpoint the exact cause, such as testing the ECM or other related components.

Cost to Fix U1073 Cadillac

The typical repair costs for addressing the U1073 code on a Cadillac can vary depending on the specific cause of the issue. In general, replacing a coolant temperature sensor can cost between $50 and $150, while addressing cooling system leaks or wiring issues may range from $100 to $300 or more. Labor costs can add an additional $80 to $150 per hour, and the total repair bill may range from $150 to $500 or more. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for U1073 Cadillac

This is typically an electrical wiring connection issue, either at the engine controller or at the sensors being monitored by the manufacturer.

It can occur if:

Someone changes a battery while the ignition switch is left on, that is, left in the RUN position.

Someone flashes/upgrades their engine controller – other modules unable to communicate with PCM during this process – this will set U1073 at a multitude of controllers on the vehicle – all false codes. Erase and carry on.

Need more information about the U1073 Cadillac code?

Need more information on how to fix the U1073 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U1073 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 U1073 Cadillac Code

1. What does OBDII code U1073 mean on a Cadillac?

Code U1073 indicates "Invalid or Missing Data for Engine Coolant," meaning the engine control module (ECM) is not receiving accurate or complete data from the coolant temperature sensor or related systems.

2. What are the common symptoms of code U1073 on a Cadillac?

Symptoms may include an illuminated check engine light, erratic engine temperature readings, poor fuel economy, engine overheating, or reduced engine performance.

3. What causes code U1073 on a Cadillac?

Common causes include a faulty engine coolant temperature sensor, damaged wiring or connectors, a malfunctioning ECM, or network communication issues within the vehicle's data bus.

4. Can code U1073 cause engine damage if ignored?

Yes, ignoring code U1073 could lead to improper engine cooling, which may cause overheating and potentially serious engine damage.

5. How do you diagnose code U1073 on a Cadillac?

Diagnosis involves checking the coolant temperature sensor, inspecting wiring and connectors for damage or corrosion, and using a scan tool to monitor data communication between modules.

6. Can a loose connector cause code U1073?

Yes, a loose or corroded connector in the coolant temperature sensor circuit can disrupt data transfer and trigger code U1073.

7. How do you fix code U1073 on a Cadillac?

Repairs may include replacing the coolant temperature sensor, repairing or replacing damaged wiring, cleaning or securing connectors, or reprogramming or replacing the ECM if necessary.

8. Is it safe to drive with code U1073 on my Cadillac?

Driving with this code is not recommended, as it can lead to overheating or erratic engine performance, potentially causing more significant issues.

9. Can low coolant levels trigger code U1073?

Low coolant levels are not a direct cause of U1073, but they can lead to overheating, which may contribute to related sensor issues.

10. Will clearing the code U1073 with a scan tool fix the problem?

Clearing the code may temporarily turn off the check engine light, but it won't address the underlying issue. The problem must be properly diagnosed and repaired to prevent the code from returning.

Discuss the causes and fixes for U1073 Cadillac OBDII Code

Submit a New Comment

Code U1073 Cadillac comments

No comments found for this page.