C1168 – OBD-II DTC

OBD-II DTC C1168 – Speed Wheel Sensor RR Coherency Fault

DTC C1168 meaning

DTC C1168 refers to a “Speed Wheel Sensor RR Coherency Fault.” This diagnostic trouble code indicates that the rear right wheel speed sensor is not providing coherent data to the vehicle’s control module. The control module expects the readings from all wheel speed sensors to be consistent with each other, and when it detects a discrepancy, it triggers this fault code.

DTC C1168 symptoms

Common symptoms associated with DTC C1168 may include:

• Illumination of the ABS warning light on the dashboard
• Inconsistent or erratic ABS operation
• Loss of traction control functionality
• Potential issues with stability control systems
• Unusual braking behavior, such as locking up or skidding

DTC C1168 causes

Several factors can lead to the triggering of DTC C1168, including:

• Faulty rear right wheel speed sensor
• Damaged wiring or connectors related to the wheel speed sensor
• Corrosion or dirt on the sensor or its mounting surface
• Issues with the vehicle’s control module or software
• Mechanical problems with the wheel assembly, such as bearing failure

DTC C1168 seriousness

DTC C1168 is considered a serious issue as it affects the vehicle’s braking and stability control systems. If left unaddressed, it can lead to compromised vehicle safety, especially in slippery or emergency conditions. It is advisable to diagnose and repair this fault promptly to ensure optimal vehicle performance and safety.

How to diagnose DTC C1168

To diagnose DTC C1168, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1168 code.
2. Inspect the rear right wheel speed sensor for physical damage or disconnection.
3. Check the wiring and connectors for signs of wear, corrosion, or damage.
4. Test the wheel speed sensor’s resistance and output voltage using a multimeter.
5. Compare the readings from the rear right sensor with those from the other wheel speed sensors.
6. Examine the vehicle’s control module for any software updates or faults.

How to fix DTC C1168 step-by-step instructions

To fix DTC C1168, follow these step-by-step instructions:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and repair any damaged wiring or connectors related to the rear right wheel speed sensor.
3. If the sensor is faulty, replace the rear right wheel speed sensor with a new one.
4. Ensure that the sensor is properly mounted and free of dirt or corrosion.
5. Reconnect any disconnected wiring and ensure all connections are secure.
6. Recheck the system by performing a test drive to see if the code reappears.

How to erase DTC C1168

To erase DTC C1168, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the diagnostic menu on the scanner and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not return.

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.