C1235 Code - Right Rear Wheel Speed Sensor Input Signal Missing
Quick Answer
The ABS module receives wheel speed readings from each wheel speed sensor and processes this information to determine if an ABS event is necessary. Common causes include Faulty Right Rear Wheel Speed Sensor, Right Rear Wheel Speed Sensor harness is open or shorted, Right Rear Wheel Speed Sensor circuit poor electrical connection. 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
- C1235 indicates Right Rear Wheel Speed Sensor Input Signal Missing.
- Common causes
- Common causes include Faulty Right Rear Wheel Speed Sensor, Right Rear Wheel Speed Sensor harness is open or shorted, Right Rear Wheel Speed Sensor circuit poor electrical connection.
- 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 C1235 Description
The active wheel speed sensor generates a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry to determine if they are functional.
The ABS module continuously monitors and compares the rotational speed of each wheel and when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper. This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS module returns the solenoid valves to their normal position and normal (base) braking resumes.
What are the Possible Causes of the DTC C1235?
- Faulty Right Rear Wheel Speed Sensor
- Right Rear Wheel Speed Sensor harness is open or shorted
- Right Rear Wheel Speed Sensor circuit poor electrical connection
How to Fix the DTC C1235?
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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1235 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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Information for Specific Makes
- C1235 Buick — Right Rear Wheel Speed Circuit Open or Shorted
- C1235 Cadillac — Right Rear Wheel Speed Circuit Open or Shorted
- C1235 Chevrolet — Right Rear Wheel Speed Circuit Open or Shorted
- C1235 Ford — Right Rear Wheel Speed Sensor Input Signal Missing
- C1235 GMC — Right Rear Wheel Speed Circuit Open or Shorted
- C1235 Lexus — Foreign Object Attached on Tip of Right Front Sensor
- C1235 Lincoln — Right Rear Wheel Speed Sensor Input Signal Missing
- C1235 Mazda — Speed Wheel Right Rear Input Signal Missing
- C1235 Mercury — Right Rear Wheel Speed Sensor Input Signal Missing
- C1235 Pontiac — Right Rear Wheel Speed Circuit Open or Shorted
- C1235 Scion — Foreign Object Attached on Tip of Right Front Sensor
- C1235 Toyota — Foreign Object Attached on Tip of Right Front Sensor
Frequently Asked Questions about C1235 Code
1. What are the common symptoms of OBDII code C1235 (Right Rear Wheel Speed Sensor Input Signal Missing)?
The common symptoms include ABS warning light illuminated on the dashboard, traction control system malfunction, and potential loss of stability control.
2. What are the possible causes of OBDII code C1235?
The code C1235 can be triggered by a faulty right rear wheel speed sensor, damaged wiring or connectors related to the sensor, or issues with the ABS module.
3. How can I diagnose the cause of OBDII code C1235?
To diagnose the cause of C1235, you can use an OBDII scanner to retrieve the code and further inspect the right rear wheel speed sensor, its wiring, and connectors for any visible damage or corrosion.
4. Can a dirty wheel speed sensor cause code C1235?
Yes, a dirty or contaminated right rear wheel speed sensor can lead to a poor signal input, triggering code C1235. It's advisable to clean the sensor before proceeding with any replacements.
5. Is it safe to drive with OBDII code C1235 active?
While the vehicle may still be drivable with code C1235, it's recommended to address the issue promptly. Driving with this code may compromise the performance of the ABS and traction control systems.
6. How can I repair OBDII code C1235?
Repairing code C1235 typically involves inspecting and potentially replacing the right rear wheel speed sensor, repairing any damaged wiring or connectors, and clearing the code with an OBDII scanner.
7. Can I reset OBDII code C1235 without fixing the underlying issue?
Resetting the code without addressing the root cause, such as a faulty sensor or wiring, may temporarily clear the warning light. However, the issue will likely resurface, and it's essential to fix the problem to ensure proper functionality.
8. What tools are needed to diagnose and repair OBDII code C1235?
Tools needed may include an OBDII scanner for code retrieval and clearing, basic hand tools for sensor and wiring inspection, and a multimeter for testing electrical connections.
9. Are there any DIY tips for troubleshooting OBDII code C1235?
DIY troubleshooting tips include visually inspecting the sensor and its connections, cleaning the sensor to remove any debris, and checking for any visible signs of damage before proceeding with replacements.
10. How long does it typically take to repair OBDII code C1235?
The repair time for code C1235 can vary depending on the extent of the issue and your experience level. In general, diagnosing and replacing a faulty sensor or repairing wiring may take a few hours to complete.
Discuss the causes and fixes for C1235 OBDII Code
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Dear After changing my Daihatsu Rush RF wheel bearing ABS light shown. if there is any connection with bearing and ABS. please let me know. I already checked and the code C1235 shown. so please give me some suggestion.
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Yes. The ABS wheel sensor is mounted near the wheel bearing. Sometimes the sensor is left disconnected when the wheel bearing is replaced.
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I Already change 2 bearing but ABS shown. would you please suggest which bearing I fixed for that.
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I dont have the manual for your vehicle, but the problem is not the wheel bearing, the C1235 code is for the Right Rear Wheel Speed Sensor
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dear sir daihatsu scanner tool show ABS {C1235 ABNORMAL CYCLE OF FR WHEEL} wheel bearing change but not genuine bearing .so please give me suggest
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