C1165 Mercury 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 Mercury 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 Mercury 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 Mercury?
- 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 Mercury?
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 Mercury 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 Mercury Code
1. What does the OBDII code C1165 mean on a Mercury?
C1165 indicates a failure in the right rear wheel speed sensor input circuit, often related to an issue with the sensor or its wiring.
2. What are the symptoms of a C1165 code on a Mercury?
Common symptoms include ABS warning light illumination, loss of ABS functionality, and inconsistent braking performance.
3. What causes the C1165 code to appear on a Mercury?
Possible causes include a faulty right rear wheel speed sensor, damaged wiring or connectors, corrosion, or issues with the ABS module.
4. Can I drive my Mercury with a C1165 code?
Yes, but driving with a malfunctioning ABS system can compromise braking safety, especially in slippery conditions.
5. How do I diagnose the C1165 code on a Mercury?
Start by visually inspecting the right rear wheel speed sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage and resistance.
6. How do I fix the C1165 code on a Mercury?
Fixes may include replacing the right rear wheel speed sensor, repairing or replacing damaged wiring, or cleaning corroded connectors.
7. How much does it cost to repair a C1165 code on a Mercury?
The cost can range from $50 to $200 for a new sensor plus labor, depending on the repair complexity and mechanic rates.
8. Can a bad ABS module cause the C1165 code?
While rare, a faulty ABS module can cause the code if it fails to properly read the sensor input.
9. How can I prevent the C1165 code from returning?
Regularly inspect and clean ABS-related components, ensure wiring is secured away from moving parts, and address any ABS warning lights promptly.
10. Will clearing the C1165 code fix the problem?
Clearing the code without addressing the root cause will not fix the issue, and the code is likely to return.
Discuss the causes and fixes for C1165 Mercury OBDII Code
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