C1165 Ford Code - Right Rear Wheel Speed Sensor Input Circuit Failure
Quick Answer
The ABS module receives wheel speed readings from each wheel speed sensor and processes this information to determine if an ABS event is necessary. Common causes include Faulty Right Rear Wheel Speed Sensor, Right Rear Wheel Speed Sensor harness is open or shorted, Right Rear Wheel Speed Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- C1165 Ford indicates Right Rear Wheel Speed Sensor Input Circuit Failure.
- Common causes
- Common causes include Faulty Right Rear Wheel Speed Sensor, Right Rear Wheel Speed Sensor harness is open or shorted, Right Rear Wheel Speed Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code C1165 Ford Description
The active wheel speed sensor generates a signal that is sent to the ABS module. The wheel speed sensor circuitry connects to the ABS module through 2 wires and a connector at each wheel speed sensor. When the ignition is turned to the RUN position, the ABS module carries out a self-test by sending a reference voltage to all of the wheel speed sensors through their circuitry to determine if they are functional.
The ABS module continuously monitors and compares the rotational speed of each wheel and when it detects an impending wheel lock, modulates brake pressure to the appropriate brake caliper. This is accomplished by triggering the hydraulic control unit (HCU) to open and close the appropriate solenoid valves. Once the affected wheel returns to normal speed, the ABS module returns the solenoid valves to their normal position and normal (base) braking resumes.
What are the Possible Causes of the DTC C1165 Ford?
- Faulty Right Rear Wheel Speed Sensor
- Right Rear Wheel Speed Sensor harness is open or shorted
- Right Rear Wheel Speed Sensor circuit poor electrical connection
How to Fix the DTC C1165 Ford?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the C1165 Ford code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about C1165 Ford Code
1. What does the OBDII code C1165 mean on a Ford vehicle?
C1165 indicates a Right Rear Wheel Speed Sensor Input Circuit Failure, meaning the vehicle's ABS module is not receiving a proper signal from the right rear wheel speed sensor.
2. What are the common symptoms of a C1165 code?
Symptoms may include an illuminated ABS or traction control warning light, improper ABS operation, or loss of traction control functionality.
3. What causes the C1165 code to appear?
Common causes include a faulty right rear wheel speed sensor, damaged wiring or connectors, corrosion, or a malfunctioning ABS module.
4. Can I drive with a C1165 code active?
While the vehicle may still be drivable, ABS and traction control systems may not function properly, increasing the risk of skidding or loss of control in slippery conditions.
5. How do I diagnose a C1165 code?
Start by inspecting the right rear wheel speed sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to test sensor resistance and verify signal output.
6. How do I fix a C1165 code on a Ford?
Repairs may include replacing the right rear wheel speed sensor, repairing damaged wiring, cleaning corroded connectors, or, in rare cases, replacing the ABS module.
7. How much does it cost to fix a C1165 code?
The cost varies depending on the repair, but replacing a wheel speed sensor typically costs $100–$300, including parts and labor.
8. Can a dirty wheel hub cause a C1165 code?
Yes, debris or dirt on the wheel hub or sensor ring can interfere with the sensor's signal, potentially triggering the code.
9. Will clearing the C1165 code fix the issue?
Clearing the code without addressing the underlying problem will not fix the issue and the code is likely to return.
10. Can a bad ABS module cause a C1165 code?
While less common, a malfunctioning ABS module can cause communication issues with the wheel speed sensor, leading to the C1165 code.
Discuss the causes and fixes for C1165 Ford OBDII Code
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Hi,I've changed the right rear abs sensor and it hasn't helped anything! Any suggestions on what to do next?
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Could this fault be caused by either a maximum difference in tread wear of rear tires from fronts, or, from there being air in the line(s)? Several years ago I did major brake system work including every part except front rotors, one front caliper, master cylinder (replaced booster), ABS module, and most brake lines. Unfortunately, I found out that bleeding the system on a Jaquar X-Type requires a computerized bleeding machine, of which h I don't have, nor do I have the fortune it takes to have it done at shop. So I just drove it carefully, babying the pedal and manipulating the brakes whenever the ABS tried to activate due to low fluid pressure. A yeah, after I garaged the car over the winter I did some systems flushing and test drive it and noticed the ABS and engine lights were on, both due to the ABS issue. I reset them a couple times and now it seems ok, but the pedal manipulation is again necessary to reduce ABS activation, and now I want if gone. Any ideas besides a budget breaking computerized shop bleed?
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Depends how much different are the tires wear difference, but I have seen many times vehicles with difference on the tire wear setting the ABS code. So, in short, it is possible. Any other codes?
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Nope, just C1165 and C1175. Fronts are brand new, rears are just about to the wear indicators
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Since both codes are for the rear sensors, then it is possible that the difference on the tires thread wear may setting the code. The only way to find out is by connecting a scanner and reading the values from the sensors.
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