AutoCodes – Cadillac – P0119 Cadillac

P0119 Cadillac Code - Engine Coolant Temperature Circuit Intermittent

Quick Answer

The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) sensor. 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: P0119 Cadillac indicates Engine Coolant Temperature Circuit Intermittent.
Common causes: Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (ECT) sensor.
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 1,006

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 30, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0119 Cadillac Description

The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The Engine Control Module (ECM) supplies 5 V to the ECT sensor signal circuit and a ground for the low reference circuit.
The ECM uses this high side coolant rationality diagnostic to determine if the input from the ECT sensor is skewed warmer than normal. The internal clock of the ECM will record the amount of time the ignition is OFF. If the calibrated ignition OFF time is met at start-up, the ECM will compare the temperature difference between the ECT and the intake air temperature (IAT) to determine if the temperatures are within an acceptable operating range of each other. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a the ECT is Intermittent for greater than 3 s.

OBDII Code P0119 Cadillac - Engine Coolant Temperature Circuit Intermittent - AutoCodes.com — P0119 Cadillac Code - Engine Coolant Temperature Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0119 Cadillac?

Low engine coolant level
Leaking or stuck open thermostat
Faulty Engine Coolant Temperature (ECT) sensor
Engine Coolant Temperature sensor harness is open or shorted
Engine Coolant Temperature sensor electrical circuit poor connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0119 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 P0119 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 P0119 Cadillac Code

1. What are the common symptoms of OBDII code P0119 in a Cadillac?

- Common symptoms include fluctuating or incorrect engine temperature readings on the dashboard, engine overheating, poor fuel economy, and potential stalling or rough idling.

2. What are the possible causes of an intermittent Engine Coolant Temperature Circuit issue (P0119) in a Cadillac?

- Possible causes include a faulty engine coolant temperature sensor, damaged wiring or connectors in the coolant temperature circuit, low coolant levels, or a malfunctioning engine control module (ECM).

3. How can I diagnose the Engine Coolant Temperature Circuit issue in my Cadillac if I suspect OBDII code P0119?

- You can diagnose the issue by checking the coolant level, inspecting the wiring and connectors for any damage, testing the engine coolant temperature sensor, and using an OBDII scanner to read the code and monitor coolant temperature data.

4. Can driving with an intermittent Engine Coolant Temperature Circuit issue (P0119) cause further damage to my Cadillac?

- Yes, driving with this issue can potentially lead to engine overheating, reduced fuel efficiency, and engine performance issues. It's important to address the problem promptly to prevent further damage.

5. How can I repair an intermittent Engine Coolant Temperature Circuit issue (P0119) in my Cadillac?

- Repair steps may include replacing the engine coolant temperature sensor, repairing or replacing damaged wiring or connectors, ensuring proper coolant levels, and resetting the ECM after making necessary repairs.

6. Is it safe to continue driving my Cadillac with OBDII code P0119 without immediate repair?

- It is not recommended to continue driving with this issue, as it can lead to engine overheating and potential long-term damage. It's best to address the problem as soon as possible.

7. Can a DIY enthusiast fix the Engine Coolant Temperature Circuit issue causing OBDII code P0119 in a Cadillac?

- Depending on your mechanical skills and access to tools, some DIY enthusiasts may be able to diagnose and repair this issue. However, if you're unsure or inexperienced, it's best to seek professional help.

8. How long does it typically take to repair an intermittent Engine Coolant Temperature Circuit issue (P0119) in a Cadillac?

- The repair time can vary depending on the exact cause of the issue and the extent of repairs needed. In general, it may take anywhere from 1 to 3 hours for a professional technician to diagnose and fix the problem.

9. Will resetting the OBDII code P0119 in my Cadillac temporarily solve the issue?

- Resetting the code may temporarily clear the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear. It's important to diagnose and repair the problem to prevent it from recurring.

10. Are there any preventive maintenance tips to avoid encountering OBDII code P0119 in a Cadillac?

- Regularly checking coolant levels, inspecting the cooling system for leaks or damage, and addressing any temperature-related issues promptly can help prevent the occurrence of Engine Coolant Temperature Circuit problems leading to OBDII code P0119.