C1283 – OBD-II DTC

OBD-II DTC C1283 – Switch Test Signal Failure

DTC C1283 meaning

DTC C1283 refers to a “Switch Test Signal Failure” in the On-Board Diagnostics II (OBD-II) system. This code indicates that the vehicle’s control module has detected an issue with the signal from a switch that is critical for the operation of certain systems, such as the traction control or stability control systems. The failure can prevent these systems from functioning correctly, potentially affecting vehicle safety and performance.

DTC C1283 symptoms

Common symptoms associated with DTC C1283 may include:

• Illumination of the check engine light or warning lights related to traction control or stability control.
• Reduced functionality of traction control or stability control systems.
• Unusual vehicle behavior during acceleration or cornering.
• Possible diagnostic trouble codes (DTCs) related to other systems.

DTC C1283 causes

Several factors can lead to the occurrence of DTC C1283, including:

• Faulty switch or sensor that provides the test signal.
• Wiring issues, such as damaged or corroded connectors.
• Faulty control module that is unable to interpret the switch signal correctly.
• Software issues within the vehicle’s control systems.

DTC C1283 seriousness

The seriousness of DTC C1283 can vary based on the vehicle’s condition and the systems affected. It is generally considered a moderate to high priority issue because:

• It can affect vehicle stability and control, especially in adverse driving conditions.
• It may lead to further complications if not addressed, potentially resulting in more extensive repairs.
• It can cause the vehicle to fail emissions tests if related systems are disabled.

How to diagnose DTC C1283

To diagnose DTC C1283, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC C1283 and check for any additional codes.
2. Inspect the vehicle’s wiring and connectors related to the switch for any visible damage or corrosion.
3. Test the switch or sensor using a multimeter to ensure it is functioning within specifications.
4. Check the control module for any software updates or faults that may affect signal interpretation.
5. Clear the DTC and perform a road test to see if the code reappears.

How to fix DTC C1283 step-by-step instructions

To fix DTC C1283, follow these step-by-step instructions:

1. Identify and replace any faulty switches or sensors that are not functioning correctly.
2. Repair or replace any damaged wiring or connectors associated with the switch.
3. Reprogram or update the control module if necessary, following manufacturer guidelines.
4. Clear the DTC using an OBD-II scanner after repairs are made.
5. Conduct a road test to ensure that the issue has been resolved and that the DTC does not return.

How to erase DTC C1283

To erase DTC C1283, you can 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. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes from the vehicle’s memory.
5. Disconnect the scanner and perform a test drive to ensure 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.