AutoCodes – Generic – C1820

C1820 Code - Air Suspension RF Air Compress Request Exceeded Max Timing

Quick Answer

The Vehicle Dynamics Module (VDM) monitors the Air Suspension RF Air Compress. Common causes include Faulty Air Suspension Height Sensor, Air Suspension Height Sensor harness is open or shorted, Air Suspension Height Sensor 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: C1820 indicates Air Suspension RF Air Compress Request Exceeded Max Timing.
Common causes: Common causes include Faulty Air Suspension Height Sensor, Air Suspension Height Sensor harness is open or shorted, Air Suspension Height Sensor 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 4,625

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 Nov 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1820 Description

The Vehicle Dynamics Module (VDM) monitors the Air Suspension RF Air Compress. The VDM sets the OBDII code when the Air Suspension RF Air Compress is not to factory specifications.

OBDII Code C1820 - Air Suspension RF Air Compress Request Exceeded Max Timing - AutoCodes.com — C1820 Code - Air Suspension RF Air Compress Request Exceeded Max Timing

What does this mean?

What are the Possible Causes of the DTC C1820?

Faulty Air Suspension Height Sensor
Air Suspension Height Sensor harness is open or shorted
Air Suspension Height Sensor circuit poor electrical connection
Faulty Vehicle Dynamics Module (VDM)

How to Fix the DTC C1820?

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 C1820 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 C1820 code?

Need more information on how to fix the C1820 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1820 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 C1820 Code

1. What are the common symptoms of OBDII code C1820?

The common symptoms of code C1820 include a noticeable decrease in the performance of the air suspension system, uneven ride height, and difficulty maintaining proper suspension levels.

2. What typically causes the OBDII code C1820 to trigger?

The OBDII code C1820 is triggered when the air suspension system's right front air compressor exceeds the maximum timing allowed for operation, often due to issues with the compressor itself or related components.

3. How can I diagnose the issue related to OBDII code C1820?

Diagnosing the issue related to code C1820 involves conducting a thorough inspection of the right front air compressor, checking the wiring and connectors for any damage, and testing the system for proper functionality.

4. Can I continue driving my vehicle with OBDII code C1820?

It is not recommended to continue driving your vehicle with OBDII code C1820, as it may lead to further damage to the air suspension system and affect the overall ride quality and safety of the vehicle.

5. What are some repair tips for resolving OBDII code C1820?

Some repair tips for resolving code C1820 include checking and repairing any damaged wiring or connectors, inspecting and potentially replacing the right front air compressor, and ensuring all air suspension components are functioning properly.

6. Is it necessary to reset the OBDII code C1820 after making repairs?

Yes, it is important to reset the OBDII code C1820 after making any necessary repairs to clear the fault code from the system and ensure the issue has been resolved successfully.

7. Can extreme weather conditions affect the triggering of OBDII code C1820?

Extreme weather conditions, such as excessively cold or hot temperatures, can potentially affect the operation of the air suspension system and contribute to triggering code C1820 due to increased stress on the components.

8. How can regular maintenance help prevent OBDII code C1820 from occurring?

Regular maintenance of the air suspension system, including checking for leaks, keeping components clean and well-lubricated, and addressing any issues promptly, can help prevent OBDII code C1820 from occurring.

9. Are there any DIY repairs I can attempt for OBDII code C1820?

While some basic inspections and checks can be done DIY, resolving OBDII code C1820 often requires specialized tools and expertise, so it is recommended to consult a professional mechanic for accurate diagnosis and repair.

10. What are the potential risks of ignoring OBDII code C1820?

Ignoring OBDII code C1820 can lead to further damage to the air suspension system, potential safety hazards while driving, and increased repair costs if left unresolved for an extended period.