C0236
Medium SeverityRear Wheel Speed Sensor Signal Erratic
Chassis/Brakes System
What Does C0236 Mean?
ABS module detects erratic signals from a rear wheel speed sensor.
Common Fix
Clean tone ring or replace sensor
Estimated Cost (DIY)
$0 - $60
Symptoms
- ⚠️ABS light on
- ⚠️ABS activating at low speed
- ⚠️Traction control intervening unexpectedly
Common Causes
How to Diagnose C0236
- 1Clean tone ring and sensor
- 2Check wheel bearing play
- 3Replace sensor if cleaning fails
OEM Diagnostic Flowchart
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C0236 requires a scanner that reads chassis modules — basic code readers won't see it.
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Related Resources
Repair guides, symptom pages, and wiring diagrams related to C0236.
OEM Manual Evidence
Browse →A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Legacy F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair manu...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Outback F4-2.5L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Outback F6-3.6L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair man...
A L L Diagnostic Trouble Codes ( DTC ) — 2013 Subaru Legacy F4-2.5L DOHC Service Manual | Operation CHARM Operation CHARM : Car repair manu...
Exact Vehicle Hubs
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Open the exact vehicle hub for a repair workflow commonly associated with C0236.
Open the exact vehicle hub for a repair workflow commonly associated with C0236.
Open the exact vehicle hub grounded by OEM manual evidence related to C0236.
Open the exact vehicle hub grounded by OEM manual evidence related to C0236.
Open the exact vehicle hub grounded by OEM manual evidence related to C0236.
Exact Repair Workflows
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Open the exact repair flow most commonly associated with C0236 on this vehicle.
Open the exact repair flow most commonly associated with C0236 on this vehicle.
Open the exact repair flow most commonly associated with C0236 on this vehicle.
Open the exact repair flow most commonly associated with C0236 on this vehicle.
Open the exact repair flow most commonly associated with C0236 on this vehicle.
Related Codes
Frequently Asked Questions
- Can a dirty tone ring cause false ABS activation?
- Yes — debris on the tone ring creates signal irregularities that the ABS interprets as wheel lock, causing premature activation.
- How do I check the tone ring?
- Remove the wheel and brake components. Inspect the toothed ring for damage, rust, or debris buildup.
Related Repair Guides
If your vehicle has triggered C0236, these DIY repair guides may help: