C1278 2015 Toyota RAV4 Code - Abnormal Change in Output Signal of Rear Speed Sensor Left
Quick Answer
The speed sensor detects the wheel speed and sends the appropriate signals to the Skid Control ECU (Brake Actuator Assembly). Common causes include Faulty Rear Speed Sensor Left, Rear Speed Sensor Left Rotor (Rear Axle Hub and Bearing Assembly Left), Rear Speed Sensor Left harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C1278 2015 Toyota RAV4 indicates Abnormal Change in Output Signal of Rear Speed Sensor Left.
- Common causes
- Common causes include Faulty Rear Speed Sensor Left, Rear Speed Sensor Left Rotor (Rear Axle Hub and Bearing Assembly Left), Rear Speed Sensor Left harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C1278 2015 Toyota RAV4 Description
What are the Possible Causes of the DTC C1278 2015 Toyota RAV4?
- Faulty Rear Speed Sensor Left
- Rear Speed Sensor Left Rotor (Rear Axle Hub and Bearing Assembly Left)
- Rear Speed Sensor Left harness is open or shorted
- Rear Speed Sensor Left circuit poor electrical connection
How to Fix the DTC C1278 2015 Toyota RAV4?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1278 2015 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the C1278 2015 Toyota RAV4 code?
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Frequently Asked Questions about C1278 2015 Toyota RAV4 Code
1. What are common symptoms associated with OBDII code C1278 in a 2015 Toyota RAV4?
The common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunction, and possible loss of stability control.
2. What could cause the OBDII code C1278 in a 2015 Toyota RAV4?
The code C1278 typically indicates an abnormal change in the output signal of the rear speed sensor on the left side, which can be caused by a faulty speed sensor, damaged wiring, or a problem with the ABS module.
3. How can I diagnose the OBDII code C1278 in my 2015 Toyota RAV4?
Diagnosing the code C1278 involves inspecting the rear speed sensor on the left side for any physical damage, checking the wiring harness for continuity, and using a scan tool to monitor sensor readings and ABS system data.
4. Is it safe to continue driving my 2015 Toyota RAV4 with the OBDII code C1278?
It is not recommended to drive the vehicle with an active C1278 code as it can affect the proper functioning of the ABS and traction control systems, potentially compromising the vehicle's safety.
5. How can I repair the OBDII code C1278 in my 2015 Toyota RAV4?
Repairing the C1278 code may involve replacing the rear speed sensor on the left side, repairing any damaged wiring, or addressing any issues with the ABS module as needed.
6. Can I reset the OBDII code C1278 in my 2015 Toyota RAV4 using a scan tool?
Yes, you can use a scan tool to clear the C1278 code after addressing the underlying issue causing the fault. However, if the problem persists, the code is likely to return.
7. Are there any DIY tips for fixing the OBDII code C1278 in a 2015 Toyota RAV4?
While some basic troubleshooting steps can be done by DIY enthusiasts, diagnosing and repairing the C1278 code may require specialized tools and expertise, so it's advisable to consult a professional mechanic.
8. Will the OBDII code C1278 affect the vehicle's overall performance in a 2015 Toyota RAV4?
While the C1278 code may not directly affect the engine performance, it can impact the functionality of the ABS and stability control systems, potentially compromising the vehicle's handling and safety.
9. How much does it typically cost to repair the OBDII code C1278 in a 2015 Toyota RAV4?
The cost of repairing the C1278 code can vary depending on the specific cause of the fault, the parts needed for replacement, and the labor rates charged by the repair shop. It's recommended to obtain quotes from different mechanics for an accurate estimate.
10. Can the OBDII code C1278 in a 2015 Toyota RAV4 be a recurring issue even after repair?
If the underlying cause of the C1278 code is not properly addressed during the repair, it is possible for the issue to recur. Regular maintenance and proper diagnosis are essential to prevent the code from reappearing.
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