AutoCodes – Chevrolet – P0218 2018 Chevrolet Silverado

P0218 2018 Chevrolet Silverado Code - Transmission Fluid Overtemperature

Quick Answer

The Transmission Fluid Temperature Sensor is a 2-wire sensor located in the pressure switch manifold. Common causes include Low transmission fluid level, Obstructions to the airflow to the radiator or transmission, Radiator damage. 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: P0218 2018 Chevrolet Silverado indicates Transmission Fluid Overtemperature.
Common causes: Common causes include Low transmission fluid level, Obstructions to the airflow to the radiator or transmission, Radiator damage.
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 302

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 Jun 09, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0218 2018 Chevrolet Silverado Description

The Transmission Fluid Temperature Sensor is a 2-wire sensor located in the pressure switch manifold. The Transmission Control Module (TCM) supplies the transmission fluid temperature sensor signal circuit and a low reference circuit. The resistance of the transmission fluid temperature sensor decreases as the oil temperature increases. The TCM monitors the voltage drop across the transmission fluid temperature sensor and calculates the temperature of the transmission fluid in the sump. The Diagnostic Trouble Code (DTC) sets when the transmission sump temperature is 122°C (251°F) or greater for 10 s.

OBDII Code P0218 2018 Chevrolet Silverado - Transmission Fluid Overtemperature - AutoCodes.com — P0218 2018 Chevrolet Silverado Code - Transmission Fluid Overtemperature

What does this mean?

What are the Possible Causes of the DTC P0218 2018 Chevrolet Silverado?

Low transmission fluid level
Obstructions to the airflow to the radiator or transmission
Radiator damage
Transmission cooling system concerns

How to Fix the DTC P0218 2018 Chevrolet Silverado?

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 P0218 2018 Chevrolet Silverado 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.

Need more information about the P0218 2018 Chevrolet Silverado code?

Need more information on how to fix the P0218 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P0218 2018 Chevrolet Silverado Code

1. What does the OBDII code P0218 mean on a 2018 Chevrolet Silverado?

P0218 indicates "Transmission Fluid Overtemperature," meaning the transmission fluid has exceeded its safe operating temperature.

2. What are the common symptoms of a P0218 code in a 2018 Chevrolet Silverado?

Symptoms may include a transmission overheating warning, slipping gears, delayed shifting, and reduced vehicle performance.

3. What causes a P0218 code on a 2018 Chevrolet Silverado?

Common causes include low transmission fluid levels, contaminated fluid, a malfunctioning transmission cooler, towing heavy loads, or prolonged driving in extreme heat.

4. Can I still drive my 2018 Chevrolet Silverado with a P0218 code?

Driving with this code is risky as overheating can damage the transmission. It's best to address the issue promptly to avoid costly repairs.

5. How do I fix a P0218 code on my 2018 Chevrolet Silverado?

Start by checking the transmission fluid level and condition, inspecting the transmission cooler, and ensuring proper airflow to the cooler. Replace or repair components as needed.

6. Can towing heavy loads cause the P0218 code on a 2018 Chevrolet Silverado?

Yes, excessive towing or hauling heavy loads can strain the transmission and cause fluid temperatures to rise, triggering the code.

7. How can I prevent a P0218 code from appearing in my 2018 Chevrolet Silverado?

Regular maintenance, including transmission fluid changes, avoiding overloading the vehicle, and ensuring the transmission cooler is functioning properly, can help prevent this code.

8. Will replacing the transmission fluid fix the P0218 code on a 2018 Chevrolet Silverado?

If the code is caused by low or degraded fluid, replacing it may resolve the issue. However, additional repairs may be needed if other components are affected.

9. Can a faulty transmission cooler trigger the P0218 code on a 2018 Chevrolet Silverado?

Yes, a malfunctioning transmission cooler can fail to regulate fluid temperatures, leading to overheating and triggering the code.

10. Is a P0218 code expensive to repair on a 2018 Chevrolet Silverado?

Repair costs vary depending on the cause. Simple fixes like fluid replacement are relatively inexpensive, while repairs to the transmission cooler or internal components may be more costly.