What is the C0045 fault number? What is Left Rear Wheel Speed Sensor Circuit Malfunction? How can I fix C0045 fault code What are the causes and symptoms of C0045 fault code
What is C0045 Fault Coding? What does it stand for?
Modern cars are equipped with an anti-lock braking (ABS) system. This system includes sensors that notify the powertrain control module, (PCM), when there is a danger. It hits the brakes to stop the wheels from locking up when the vehicle is braking suddenly or hard. It is an important safety system for the passengers.
Wheel speed sensors (also known as WSS or ABS) are used to measure wheel speeds. There are usually four speed sensors for each wheel on a vehicle. This is because the wheels of a vehicle don’t always turn at the same speed.
The wheel hub is usually where the legacy wheel speed sensors are located. Moderner ones include a reluctor, a threaded ring and a magnet embedded into a coil. These are located inside the wheel hub assembly. The wheel hub assembly rotates with the reluctor, which is mounted on the wheel shaft or wheel hub. Wheel speed sensors produce a voltage signal that is proportional to the magnetic field. This magnetic field changes with each turn of the wheel. The frequency and amplitudes generated by the sensor will increase with the speed of the wheel.
ABS module uses the data generated by sensors to control its ABS system. This data can be used by other modules depending on the vehicle make and model.
Fault code C0045 indicates a fault in the left rear-wheel speed sensor or circuit.
Note: The fault code C0045 is used in OBD-equipped vehicles. However, it can also be used for other purposes. “Brake Pressure Sensitor B” OBD2-equipped vehicles. If the ABS module detects that the brake pedal pressure sensor labeled as “B” is not meeting factory specifications or is not functioning properly, this code will be triggered. Refer to your vehicle’s service manual to determine which sensor “B” is.
C0045 fault codes can be found on vehicles made by GM, Saturn, GM and Isuzu.
What is the C0045 Fault Code and Why Does It Happen?
Below are some reasons why C0045 should be set.
- – Left rear wheel speed sensor defective
- – Issues with the wheel speed sensor circuit, such as damaged wiring, corrosion, or loose connections
- – Broken wheel speed sensor relay wheel
- ABS Module Problems
OBD2-equipped vehicles
- – B. Defective brake pressure sensor
- – Broken, damaged, or melted wires to the brake pressure sensor.
What are the C0045 Fault Code Significances?
These symptoms may be present if you own a vehicle with C0045 as the fault code.
- – ABS light at instrument panel
- – Illumination for the check engine light
- – Illumination and control of warning lamps, such as stability and traction control systems.
- ABS system not working
- – Inconsistency in vehicle speed and mileage speedometer
- – Light strokes on the brake pedal
How do I fix the C0045 fault code?
There are several repairs that can be made to fix the C0045 fault code:
- – Examine all electrical components in the left rear wheelspeed sensor circuit. Investigate any corrosion or burns to determine the extent of damage and make any corrections.
- Verify that both the supply voltage (and the reference voltage) for the left rear-wheel speed sensor electrical circuit is equal to the ones in the service guide. You can measure the continuity of the cables if one of these values is not within the range.
- – Inspect the left rear wheel speed sensor. Follow the manufacturer’s recommendations. Replace the sensor if you notice inconsistencies.
OBD2-equipped vehicles
- – Removing and testing the brake pressure sensor “B”, if necessary.
- – Repair or replacement damaged wires and/or connectors for the sensor
How Serious Is the C0045 Fault Coding?
While problems with the wheel speed sensor will not affect brake function in normal conditions, they can affect the grip of brakes on wet, slippery, or icy roads. Because data from the wheel speed sensor is also used to input traction control and stability control systems, this can be problematic. To avoid further damage to the sensor and its components, it is important to fix the problem immediately.
