C1278 2014 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 2014 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 2014 Toyota RAV4 Description
What are the Possible Causes of the DTC C1278 2014 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 2014 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 2014 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.
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Frequently Asked Questions about C1278 2014 Toyota RAV4 Code
1. What are the common symptoms of OBDII code C1278 in a 2014 Toyota RAV4?
The common symptoms of OBDII code C1278 in a 2014 Toyota RAV4 include ABS warning light illuminated on the dashboard, traction control system malfunction, and potential loss of stability control.
2. What does the OBDII code C1278 for a 2014 Toyota RAV4 indicate?
OBDII code C1278 for a 2014 Toyota RAV4 indicates an abnormal change in the output signal of the rear speed sensor on the left side of the vehicle.
3. What are the possible causes of OBDII code C1278 in a 2014 Toyota RAV4?
Possible causes of OBDII code C1278 in a 2014 Toyota RAV4 include a faulty rear speed sensor on the left side, damaged wiring or connectors related to the sensor, or issues with the ABS control module.
4. How can I diagnose OBDII code C1278 in my 2014 Toyota RAV4?
Diagnosing OBDII code C1278 in a 2014 Toyota RAV4 involves using a diagnostic scan tool to retrieve the fault code, inspecting the rear speed sensor and its wiring for any visible damage, and testing the sensor's output signal for abnormalities.
5. Is it safe to drive my 2014 Toyota RAV4 with OBDII code C1278 active?
It is not recommended to drive your 2014 Toyota RAV4 with OBDII code C1278 active, as it can affect the proper functioning of the ABS and traction control systems, potentially compromising vehicle safety.
6. Can I repair OBDII code C1278 in my 2014 Toyota RAV4 myself?
Repairing OBDII code C1278 in a 2014 Toyota RAV4 may require specialized knowledge and tools. It is recommended to consult a professional mechanic to accurately diagnose and fix the issue.
7. How much does it typically cost to repair OBDII code C1278 in a 2014 Toyota RAV4?
The cost of repairing OBDII code C1278 in a 2014 Toyota RAV4 can vary depending on the exact cause of the issue. It may involve replacing the rear speed sensor, repairing damaged wiring, or addressing problems with the ABS control module.
8. Can OBDII code C1278 in a 2014 Toyota RAV4 cause other problems if left unaddressed?
If left unaddressed, OBDII code C1278 in a 2014 Toyota RAV4 can lead to continued ABS and traction control system malfunctions, potentially compromising vehicle stability and safety.
9. Are there any preventive measures to avoid OBDII code C1278 in a 2014 Toyota RAV4?
Regular maintenance checks, including inspecting the condition of the speed sensors and wiring, can help prevent issues like OBDII code C1278 in a 2014 Toyota RAV4.
10. How long does it typically take to repair OBDII code C1278 in a 2014 Toyota RAV4?
The repair time for OBDII code C1278 in a 2014 Toyota RAV4 can vary depending on the exact cause of the issue and the availability of parts. It may take a few hours to a full day to diagnose and fix the problem.
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