C1235 Ford Code - Right Rear Wheel Speed Sensor Input Signal Missing
Quick Answer
The Anti-Lock Brake System (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 Mismatched Tire Size, Damage Wheel Speed Sensor Ring, Faulty Right Rear Wheel Speed Sensor. 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 Ford indicates Right Rear Wheel Speed Sensor Input Signal Missing.
- Common causes
- Common causes include Mismatched Tire Size, Damage Wheel Speed Sensor Ring, Faulty Right Rear Wheel Speed Sensor.
- 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 Ford 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 the 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 Ford?
- Mismatched Tire Size
- Damage Wheel Speed Sensor Ring
- 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
- Faulty Anti-Lock Brake System (ABS) Module
How to Fix the DTC C1235 Ford?
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
2002-2004 Ford Explorer Factory Service Bulletin OBDII Code C1235
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1235 Ford 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 C1235 Ford Code
1. What are the common symptoms of OBDII code C1235 in a Ford indicating a Right Rear Wheel Speed Sensor Input Signal Missing?
- Common symptoms include the ABS warning light illuminating on the dashboard, traction control system malfunctions, and potential loss of stability control.
2. What could cause the Right Rear Wheel Speed Sensor Input Signal Missing code (C1235) in a Ford vehicle?
- Possible causes include a faulty right rear wheel speed sensor, damaged or disconnected wiring to the sensor, or problems with the ABS module.
3. How can I troubleshoot the Right Rear Wheel Speed Sensor Input Signal Missing code (C1235) in my Ford?
- Start by visually inspecting the right rear wheel speed sensor and its wiring for any damage or loose connections. You can also use a multimeter to test the sensor's resistance and check for proper voltage signals.
4. Can a dirty or contaminated wheel speed sensor cause the C1235 code in a Ford?
- Yes, dirt, debris, or metal shavings accumulation on the right rear wheel speed sensor can disrupt its signal and trigger the C1235 error code.
5. Is it safe to continue driving with the C1235 code related to a missing right rear wheel speed sensor input signal in a Ford?
- It is not recommended to drive the vehicle with this code present, as it can affect the proper functioning of the ABS and traction control systems, potentially compromising safety.
6. How do I reset the C1235 code after repairing the right rear wheel speed sensor issue in my Ford?
- Once the underlying issue causing the code is fixed, you can reset the OBDII code by using a diagnostic scanner or disconnecting the vehicle's battery for a few minutes.
7. Do I need specialized tools to replace the right rear wheel speed sensor in my Ford to resolve the C1235 code?
- Depending on the vehicle model, replacing the right rear wheel speed sensor may require basic hand tools, such as sockets and wrenches, and possibly a jack and jack stands for lifting the vehicle.
8. Can extreme weather conditions affect the right rear wheel speed sensor and trigger the C1235 code in a Ford?
- Yes, extreme cold or hot temperatures, as well as moisture or corrosion, can impact the performance of the wheel speed sensor and lead to the C1235 error code.
9. Are there any DIY tips for preventing the recurrence of the C1235 code in a Ford after repairing the right rear wheel speed sensor issue?
- Ensuring proper installation and securing of the new sensor, as well as regular maintenance to keep the sensor and its surroundings clean, can help prevent the code from reappearing.
10. Should I seek professional help for diagnosing and repairing the C1235 code related to the right rear wheel speed sensor input signal missing in my Ford?
- If you are unsure about diagnosing or repairing the issue yourself, it is advisable to consult a qualified mechanic or dealership with experience in ABS and traction control systems for accurate diagnosis and repairs.
Discuss the causes and fixes for C1235 Ford OBDII Code
-
2008 Ford Explorer, receiving code for right rear wheel speed sensor. ABS light on and not able to use traction control switch. Flashing Red light on Dash every 5 min with chime. I have replaced the sensor and cleaned the hub, checking for cracks etc but still no help eliminating code. any suggestions on where to look next?
-
What model and year is your vehicle? have you clean the hub gear and check the wires from the sensor to the control unit?
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