OBD Guide
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C1236

Left Rear Wheel Speed Sensor Input Signal Missing

C1236 is an OBD-II diagnostic trouble code meaning: Left Rear Wheel Speed Sensor Input Signal Missing. Common causes: broken or damaged wiring harness, wheel speed sensor malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS light is on
  • ABS system is inactive
  • ESP may turn off
  • Possible problems with cruise control

Causes

  • Broken or damaged wiring harness
  • Wheel speed sensor malfunction
  • Poor contact in the sensor connector
  • Damage to the gear rotor (reference wheel)
  • ABS control unit malfunction

How to Fix

  1. Check the integrity of the sensor wiring harness
  2. Check the connectors of the sensor and the ABS unit
  3. Test the wheel speed sensor (with an ohmmeter or oscilloscope)
  4. Replace the wheel speed sensor if necessary
  5. Check the condition of the reference wheel

Related codes

C1234C1235C1237C1238

FAQ

What does the C1236 code mean?

C1236 is an OBD-II diagnostic trouble code that indicates: Left Rear Wheel Speed Sensor Input Signal Missing

What causes a C1236 error code?

The most common causes of C1236 include: Broken or damaged wiring harness; Wheel speed sensor malfunction; Poor contact in the sensor connector; Damage to the gear rotor (reference wheel).

How do I fix a C1236 diagnostic trouble code?

To fix C1236: Check the integrity of the sensor wiring harness. Check the connectors of the sensor and the ABS unit. Test the wheel speed sensor (with an ohmmeter or oscilloscope). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1236?

Limited driving only, diagnose soon

How much does it cost to fix C1236?

The estimated repair cost for C1236 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat