AutoCodes – Infiniti – C1802 Infiniti

C1802 Infiniti Code - Air Suspension Air Compressor Relay

Quick Answer

The Air Levelizer Control Module monitors the Air Compressor Relay. Common causes include Faulty Air Compressor Relay, Air Compressor Relay harness is open or shorted, Air Compressor Relay 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
C1802 Infiniti indicates Air Suspension Air Compressor Relay.
Common causes
Common causes include Faulty Air Compressor Relay, Air Compressor Relay harness is open or shorted, Air Compressor Relay 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 1,485
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Nov 30, 2020
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Code C1802 Infiniti Description

The Air Levelizer Control Module monitors the Air Compressor Relay. The Air Levelizer Control Module sets the OBDII code when the Air Compressor Relay is not to factory specifications.
OBDII Code C1802 Infiniti - Air Suspension Air Compressor Relay - AutoCodes.com
C1802 Infiniti Code - Air Suspension Air Compressor Relay

What are the Possible Causes of the DTC C1802 Infiniti?

  • Faulty Air Compressor Relay
  • Air Compressor Relay harness is open or shorted
  • Air Compressor Relay circuit poor electrical connection
  • Faulty Air Levelizer Control Module

How to Fix the DTC C1802 Infiniti?

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 C1802 Infiniti 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 C1802 Infiniti code?

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Need Help with the Code?

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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 C1802 Infiniti Code

1. What are the common symptoms of OBDII code C1802 in an Infiniti related to the Air Suspension Air Compressor Relay?

The common symptoms include issues with the air suspension system, such as a sagging rear end, harsh ride, or abnormal noises when driving over bumps.

2. What can cause the OBDII code C1802 in an Infiniti related to the Air Suspension Air Compressor Relay?

The code C1802 can be triggered by a faulty air suspension air compressor relay, a damaged relay wiring harness, or a malfunctioning air suspension compressor itself.

3. How can I diagnose the OBDII code C1802 in an Infiniti related to the Air Suspension Air Compressor Relay?

Diagnosing the issue involves using an OBDII scanner to retrieve the code, inspecting the air suspension components for any visible damage, and testing the relay and compressor for proper functionality.

4. Can I continue driving my Infiniti with the OBDII code C1802 related to the Air Suspension Air Compressor Relay?

It is not recommended to continue driving the vehicle with this code, as it can lead to further damage to the air suspension system and potentially compromise the vehicle's handling and ride comfort.

5. How can I repair the OBDII code C1802 in an Infiniti related to the Air Suspension Air Compressor Relay?

Repairing the issue may involve replacing the faulty air suspension air compressor relay, repairing or replacing the wiring harness, or addressing any underlying issues with the air suspension system.

6. Are there any DIY tips for resolving the OBDII code C1802 related to the Air Suspension Air Compressor Relay in an Infiniti?

While some basic troubleshooting steps can be performed by DIY enthusiasts, it is recommended to consult a professional mechanic or dealership for an accurate diagnosis and repair of the air suspension system.

7. Is the OBDII code C1802 related to the Air Suspension Air Compressor Relay common in certain Infiniti models?

This code is more commonly reported in specific Infiniti models equipped with air suspension systems, such as certain QX80 or QX56 models, but it can occur in other models as well.

8. Can a temporary fix be applied to address the OBDII code C1802 related to the Air Suspension Air Compressor Relay in an Infiniti?

Temporary fixes, such as disconnecting the battery to reset the system or clearing the code with an OBDII scanner, may provide a short-term solution, but the underlying issue should still be addressed promptly.

9. What are the potential risks of ignoring the OBDII code C1802 related to the Air Suspension Air Compressor Relay in an Infiniti?

Ignoring this code can lead to further damage to the air suspension system, potential safety hazards while driving, and increased repair costs if the issue is not resolved in a timely manner.

10. How much does it typically cost to repair the OBDII code C1802 related to the Air Suspension Air Compressor Relay in an Infiniti?

The cost of repair can vary depending on the extent of the damage, the specific components that need replacement, and whether the work is done at a dealership or an independent mechanic. It is recommended to obtain quotes from different service providers for an accurate estimate.

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