What does C1165 mean on a Ford?

C1165. Wheel Speed Sensor RR Input Circuit Failure. Applies to Escape, Fusion, Focus, Taurus, Explorer.

What causes C1165 on a Ford?

Failed right rear wheel speed sensor Open or shorted RR sensor circuit Damaged RR tone ring Excessive RR bearing play Corroded connector

How do I fix C1165 on a Ford?

Compare rear wheel speeds on a roll test Test RR sensor resistance and signal Inspect tone ring and bearing Verify circuit wiring Replace the sensor per test data

Code

C1165

Wheel Speed Sensor RR Input Circuit Failure

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

Failed right rear wheel speed sensor
Open or shorted RR sensor circuit
Damaged RR tone ring
Excessive RR bearing play
Corroded connector

Standard procedure

Compare rear wheel speeds on a roll test
Test RR sensor resistance and signal
Inspect tone ring and bearing
Verify circuit wiring
Replace the sensor per test data

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

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Last updated 2026-09-25.

Report a correction for C1165. 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.