The OBD code C0078 indicates a problem with the steering angle sensor circuit.
This affects the AntiLock Brake System (ABS) and can trigger the ABS warning light and engine light.
Low or high tire pressure, or incorrect tire diameter, can cause this issue.
It’s a moderate concern.
To fix it, check the wiring harness, connectors, and sensor for any damage or corrosion.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
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Symptoms of the c0078 OBD Code
The vehicle displays an ABS warning light on the dashboard.
- Symptoms: AntiLock Brake System (ABS) Warning Light ON.
- Service Engine Soon Warning Light ON.
- Possible symptoms include issues with the vehicle’s stability control system.
- Braking performance may be affected.
- The vehicle may exhibit unusual ABS system behavior, such as activating unexpectedly.
Causes of the c0078 OBD Code
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Possible triggers for fault code C0078 include issues with the steering angle sensor or its circuit.
- C0078 can be caused by low tire pressure.
- High tire pressure.
- Incorrect tire diameter.
Fixing Error Code c0078 Step By Step
To address fault code C0078, inspect the wheel speed sensor circuit for potential issues.
- To fix OBDII code C0078, first, review the ‘Possible Causes’ mentioned above and visually examine the corresponding wiring harness and connectors.
- Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Next, check the wheel speed sensor wiring and connections for any issues.
- Inspect the wheel speed sensors for damage or contamination.
- Test the wheel speed sensors using a multimeter to ensure they are functioning correctly.
- Replace any faulty wheel speed sensors or repair damaged wiring as necessary.
- Finally, clear the fault codes with a scan tool and test drive the vehicle to verify that the issue has been resolved.
Cost Of Fixing c0078 Fault Code
Diagnosing and repairing fault code C0078 may involve inspecting and replacing the wheel speed sensor.
The cost to diagnose and fix OBD code C0078 depends on the estimated 1. 0hour repair time.
Labor rates usually range from $75 to $150 per hour, so the general cost could be between $75 and $150. The final cost may vary based on shop rates, complexity of the issue, and any additional parts needed for the repair.
Details of the c0078 OBD Code
Code C0078 indicates a steering position sensor circuit malfunction in the vehicle’s electronic stability control system.
OBD code C0078 indicates a Steering Angle Sensor Circuit Range/Performance issue.
This code is triggered by the Electronic Brake Control Module (EBCM) when it detects that the signal from the steering angle sensor is out of the expected range or not performing within specified parameters.
The steering angle sensor is a critical component of the Electronic Stability Control (ESC) system, providing data on the steering wheel position and rate of turn to help the system determine the vehicle’s intended direction.
Mechanic’s Tech Notes
Code C0078 indicates an issue with the steering angle sensor calibration.
OBDII code C0078 indicates a problem with the steering angle sensor circuit.
To diagnose, use a voltmeter to check the sensor’s power and ground connections for proper voltage levels.
Utilize a scan tool to monitor the sensor’s data and ensure it communicates over the CAN network.
Visually inspect the wiring harness and connectors for any damage, and check for broken, bent, or corroded pins.
If all connections look good, the issue may lie with the sensor itself, requiring replacement.
Reflashing the system may also be necessary to clear the fault code.
FAQ
OBD code C0078 indicates a problem with the wheel speed sensor circuit. Check tire pressure, diameter, and wiring for damage or corrosion.
Common symptoms for OBD code C0078 include ABS warning light and engine light on. Possible causes are incorrect tire pressure or diameter. Inspect wiring and connectors for damage.
Diagnose OBD code C0078 by checking tire pressure, diameter, and wiring. Inspect harness, connectors, and pins for damage or corrosion. Fix as needed.
Wrap Up
If your ABS warning light is illuminated and you retrieve OBDII code c0078, it may indicate a fault in the steering angle sensor circuit.
This could be caused by a damaged sensor, faulty wiring connections, or a malfunctioning control module.
To address OBDII code c0078, start by inspecting the wiring harness and connectors related to the steering angle sensor.
Look for any signs of damage, corrosion, or loose connections.
Test the sensor’s output signal and consider replacing it if necessary.
