C1813 – OBD-II DTC

OBD-II DTC C1813 – Air Suspension LR Vent Request Exceeded Max Timing

DTC C1813 meaning

DTC C1813 refers to a diagnostic trouble code related to the air suspension system, specifically indicating that the left rear (LR) vent request has exceeded the maximum timing allowed. This code suggests that the air suspension system is experiencing issues with venting air from the left rear air spring, which can affect the vehicle’s ride height and overall suspension performance.

DTC C1813 symptoms

Common symptoms associated with DTC C1813 may include:

• Uneven ride height, particularly on the left rear side
• Warning lights on the dashboard, such as the air suspension warning light
• Increased noise from the air suspension system
• Possible loss of ride comfort or handling issues

DTC C1813 causes

Several factors can lead to the triggering of DTC C1813, including:

• Faulty air suspension compressor
• Leaking air springs or lines
• Malfunctioning height sensors
• Electrical issues, such as damaged wiring or connectors
• Software or calibration issues within the air suspension control module

DTC C1813 seriousness

DTC C1813 is considered a serious issue as it can lead to compromised vehicle handling and safety. If left unaddressed, it may result in further damage to the air suspension system and could affect the vehicle’s stability, especially during driving conditions that require optimal suspension performance.

How to diagnose DTC C1813

To diagnose DTC C1813, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1813 code.
2. Inspect the air suspension system for visible leaks or damage.
3. Check the operation of the air suspension compressor and ensure it is functioning correctly.
4. Test the height sensors for proper operation and calibration.
5. Examine the wiring and connectors for any signs of wear or damage.
6. Review the vehicle’s service history for any previous repairs related to the air suspension system.

How to fix DTC C1813 step-by-step instructions

To fix DTC C1813, follow these step-by-step instructions:

1. Address any identified leaks in the air springs or lines by replacing damaged components.
2. Repair or replace the air suspension compressor if it is not functioning properly.
3. Calibrate or replace faulty height sensors as needed.
4. Repair any damaged wiring or connectors associated with the air suspension system.
5. Update the air suspension control module software if necessary.
6. Clear the DTC using an OBD-II scanner and perform a test drive to ensure the issue is resolved.

How to erase DTC C1813

To erase DTC C1813, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Access the diagnostic trouble codes menu on the scanner.
4. Select the option to clear or erase codes.
5. Confirm the action and wait for the scanner to complete the process.
6. Disconnect the scanner and start the vehicle to verify that the code does not reappear.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.