C1236 Lincoln Code - Left 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 Left 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
- C1236 Lincoln indicates Left Rear Wheel Speed Sensor Input Signal Missing.
- Common causes
- Common causes include Mismatched Tire Size, Damage Wheel Speed Sensor Ring, Faulty Left 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 C1236 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 C1236 Lincoln?
- Mismatched Tire Size
- Damage Wheel Speed Sensor Ring
- Faulty Left Rear Wheel Speed Sensor
- Left Rear Wheel Speed Sensor harness is open or shorted
- Left Rear Wheel Speed Sensor circuit poor electrical connection
- Faulty Anti-Lock Brake System (ABS) Module
How to Fix the DTC C1236 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 C1236
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1236 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 C1236 Lincoln code?
Need more information on how to fix the C1236 Lincoln code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C1236 Lincoln code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about C1236 Lincoln Code
What does the OBDII code C1236 mean for my Lincoln?
C1236 indicates that the left rear wheel speed sensor input signal is missing, which can affect the vehicle's traction control and anti-lock braking systems.
What symptoms might I experience if my Lincoln has code C1236?
Common symptoms include the illumination of the ABS warning light, traction control warning light, a decrease in braking performance, and potential issues with stability control.
What could cause the C1236 code to trigger?
Possible causes include a faulty left rear wheel speed sensor, damaged wiring or connectors, a problem with the ABS control module, or issues with the vehicle’s braking system.
How can I diagnose the issue related to code C1236?
Start by visually inspecting the left rear wheel speed sensor and its wiring for any damage or disconnections. Use a multimeter to check the sensor’s resistance and ensure it’s within the manufacturer’s specifications.
What are some repair options for code C1236?
Repairs may involve replacing the left rear wheel speed sensor, repairing any damaged wiring or connectors, or addressing issues within the ABS control module.
Is it safe to drive my Lincoln with code C1236?
While it may be drivable, it is not safe to ignore this code, as it can affect your braking and stability control systems. It’s advisable to have it diagnosed and repaired promptly.
Can I clear the C1236 code without fixing the issue?
Yes, you can clear the code using an OBDII scanner, but the underlying issue will likely cause the code to return until properly repaired.
How much does it typically cost to fix the issue associated with code C1236?
Repair costs can vary widely depending on the cause, but replacing a wheel speed sensor can range from $100 to $300, including parts and labor.
Will a malfunctioning left rear wheel speed sensor affect other systems in my vehicle?
Yes, a malfunctioning wheel speed sensor can impact the ABS, traction control, and electronic stability control systems, leading to reduced safety and performance.
Discuss the causes and fixes for C1236 Lincoln OBDII Code
-
My ABS light flashes 3 time and stop and then flashes 2 times and repeats it a number of time and then stays on .
-
Unfortunately, it is very difficult and sometimes inaccurate to read a code by counting the warning light flashes. I recommend having a shop read the codes ABS code for you. Some auto parts will also check the codes for free.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
