What Does C1165 Mean?
This code indicates the ABS control module has detected a general input circuit failure for the right rear wheel speed sensor. The module cannot obtain a valid speed signal from the RR sensor, which could result from sensor degradation, wiring damage, or connector issues. The RR wheel speed data is essential for ABS and traction control calculations.
Safety Warning
ABS and traction control are likely disabled. Stopping distances may increase on slippery surfaces. Repair promptly.
Common Causes
35%
Failed right rear wheel speed sensor with degraded coil or contaminated magnetic element
25%
Corroded or damaged wiring from underbody exposure to road salt, mud, and debris
20%
Excessive air gap from worn rear wheel bearing or sensor not properly seated
15%
Loose or corroded connector preventing reliable electrical contact
5%
ABS module internal failure on the RR sensor input
Diagnostic Steps
1
Step 1: Inspect the RR wheel speed sensor, wiring, and connector for damage, corrosion, or contamination.
2
Step 2: Measure sensor resistance (800-1400 ohms typical). Compare to the LR sensor reading.
3
Step 3: Check sensor air gap and tone ring condition. Verify the sensor is fully seated.
4
Step 4: Test wiring continuity from sensor connector to ABS module connector. Check for shorts to ground and battery.
5
Step 5: Clear codes, test drive above 15 mph, and verify stable RR wheel speed in live data.
Estimated Repair Cost
$100 - $400
Parts + labor, varies by vehicle and location
This code indicates the ABS control module has detected a general input circuit failure for the right rear wheel speed sensor. The module cannot obtain a valid speed signal from the RR sensor, which could result from sensor degradation, wiring damage, or connector issues. The RR wheel speed data is ...
The most common cause of C1165 (Speed Wheel Sensor RR Input Circuit Failure) is: Failed right rear wheel speed sensor with degraded coil or contaminated magnetic element
Typical repair costs for C1165 range from $100 to $400, depending on the vehicle, location, and whether you do it yourself or go to a shop.
ABS and traction control are likely disabled. Stopping distances may increase on slippery surfaces. Repair promptly.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to C1165 to identify the root cause.
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Quick Info
Category
Chassis
System
Anti-lock Brake System (ABS) / Traction Control System
Difficulty
Type
Manufacturer
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