What does C1236 mean on a Ford?

C1236. Wheel Speed LR Input Signal Missing. Applies to Escape, Fusion, Focus, Taurus, Explorer.

What causes C1236 on a Ford?

Dead left rear wheel speed sensor Severed LR sensor wire Damaged tone ring Dislodged sensor Module input fault

How do I fix C1236 on a Ford?

Verify LR reads zero while others track speed Check sensor seating and gap Test circuit continuity Inspect the tone ring Replace the sensor per results

Code

C1236

Wheel Speed LR Input Signal Missing

Category: Chassis
Severity: ABS Light
Applies to: Escape, Fusion, Focus, Taurus, Explorer
Related: No single generic twin. See OBD Codes List

Findings, check these first

Dead left rear wheel speed sensor
Severed LR sensor wire
Damaged tone ring
Dislodged sensor
Module input fault

Standard procedure

Verify LR reads zero while others track speed
Check sensor seating and gap
Test circuit continuity
Inspect the tone ring
Replace the sensor per results

Code lookup

Type a code above, or start from a symptom or a common code.

Press / to jump to the box. Ford-enhanced powertrain, body, chassis and network codes. Generic P0xxx codes live on OBD Codes List.

Sources and review

Review: no source links are recorded for this entry.

Last updated 2026-09-25.

Report a correction for C1236. Include your vehicle, the issue and a source if you have one.

This fault is part of the Ford ABS and traction control codes guide. It covers the family and the order to check it.