C1277 Scion Code - Abnormal Change in Output Signal of Rear Speed Sensor Right
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 Right, Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right 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
- C1277 Scion indicates Abnormal Change in Output Signal of Rear Speed Sensor Right.
- Common causes
- Common causes include Faulty Rear Speed Sensor Right, Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right), Rear Speed Sensor Right 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 C1277 Scion Description
What are the Possible Causes of the DTC C1277 Scion?
- Faulty Rear Speed Sensor Right
- Rear Speed Sensor Right Rotor (Rear Axle Hub and Bearing Assembly Right)
- Rear Speed Sensor Right harness is open or shorted
- Rear Speed Sensor Right circuit poor electrical connection
How to Fix the DTC C1277 Scion?
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 C1277 Scion 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 C1277 Scion Code
1. What does the OBDII code C1277 mean for a Scion?
The code C1277 indicates an "Abnormal Change in Output Signal of Rear Speed Sensor Right," meaning the ABS module has detected an irregular signal from the right rear wheel speed sensor.
2. What are the common symptoms of code C1277 in a Scion?
Symptoms include the ABS warning light turning on, traction control issues, reduced braking performance, and possible erratic speedometer readings.
3. What causes the C1277 code to appear in a Scion?
Common causes include a faulty right rear wheel speed sensor, damaged wiring or connectors, corrosion in the sensor circuit, or a malfunctioning ABS module.
4. How can I diagnose a C1277 code on my Scion?
Start by scanning the ABS system with an OBDII scanner, inspecting the right rear wheel speed sensor and wiring for damage, and checking for proper connection or corrosion.
5. Can I drive my Scion with the C1277 code active?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, which can compromise safety in certain driving conditions.
6. How do I fix the C1277 code on a Scion?
Repairs may include replacing the faulty right rear wheel speed sensor, repairing damaged wiring, cleaning corroded connectors, or recalibrating the ABS module.
7. How much does it cost to repair a C1277 code on a Scion?
Repair costs vary but typically range from $100 to $300, depending on whether the wheel speed sensor needs replacement or if there are wiring issues.
8. Can a dirty wheel hub cause the C1277 code on a Scion?
Yes, dirt or debris on the wheel hub can interfere with the sensor’s ability to read the wheel speed properly, potentially triggering the code.
9. What tools are needed to troubleshoot the C1277 code on a Scion?
Basic tools include an OBDII scanner with ABS functionality, a multimeter for testing the sensor and wiring, and inspection tools for checking physical damage.
10. Will clearing the C1277 code fix the issue permanently?
No, clearing the code without addressing the underlying problem will only temporarily turn off the warning light, and the code is likely to return.
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