C1235 Lincoln 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 Lincoln 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 Lincoln 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 Lincoln?
- 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 Lincoln?
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
2003-2004 Lincoln Aviator Factory Service Bulletin OBDII Code C1235
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1235 Lincoln 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 C1235 Lincoln code?
Need more information on how to fix the C1235 Lincoln code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C1235 Lincoln code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C1235 Lincoln Code
1. What does the OBDII code C1235 mean on a Lincoln?
C1235 indicates that the right rear wheel speed sensor input signal is missing or not being detected by the ABS module.
2. What are the common symptoms of code C1235 on a Lincoln?
Symptoms may include an illuminated ABS or traction control warning light, loss of ABS or traction control functionality, and possibly erratic speedometer readings.
3. What causes the C1235 code on a Lincoln?
Common causes include a faulty right rear wheel speed sensor, damaged or corroded wiring, loose connections, or a malfunctioning ABS module.
4. Can a dirty wheel speed sensor cause the C1235 code?
Yes, dirt, debris, or metal shavings on the sensor or tone ring can interfere with the signal and trigger this code.
5. How can I fix the C1235 code on my Lincoln?
Inspect the right rear wheel speed sensor and wiring for damage or corrosion, clean the sensor and tone ring, and replace the sensor if necessary. If the issue persists, test the ABS module.
6. Is it safe to drive with the C1235 code on a Lincoln?
While the vehicle may still be drivable, the ABS and traction control systems may not function properly, reducing safety in slippery conditions.
7. How do I test the right rear wheel speed sensor on a Lincoln?
Use a multimeter to check the sensor's resistance and verify the output signal with an oscilloscope while rotating the wheel to ensure proper function.
8. Can a damaged tone ring cause the C1235 code?
Yes, a damaged or misaligned tone ring can prevent the wheel speed sensor from reading the signal correctly, leading to this code.
9. How much does it cost to repair the C1235 code on a Lincoln?
Repair costs vary but typically range from $100 to $300, depending on whether the issue is with the sensor, wiring, or ABS module.
10. Will clearing the code fix the C1235 issue permanently?
No, simply clearing the code will not fix the underlying problem. You must diagnose and repair the root cause to resolve the issue.
Discuss the causes and fixes for C1235 Lincoln OBDII Code
Code C1235 Lincoln comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
