AutoCodes – Cadillac – C1205 Cadillac

C1205 Cadillac Code - Right Front Wheel Speed Sensor Input Signal Equals Zero

Quick Answer

As the wheel is rotated, the speed sensor produces an AC voltage that increases with wheel speed. Common causes include Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted, Right Front 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: C1205 Cadillac indicates Right Front Wheel Speed Sensor Input Signal Equals Zero.
Common causes: Common causes include Faulty Right Front Wheel Speed Sensor, Right Front Wheel Speed Sensor harness is open or shorted, Right Front 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.

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Code Popularity 241

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1205 Cadillac Description

As the wheel is rotated, the speed sensor produces an AC voltage that increases with wheel speed. The Electronic Brake Control Module (EBCM) uses the frequency of the AC signal to calculate the wheel speed. The speed sensor is connected to the EBCM by a twisted pair of wires. Twisting reduces noise susceptibility that may cause a Diagnostic Trouble Code (DTC) to be set. The DTC will be set when the right front wheel speed equals 0, and all of the remaining wheel speed sensors are greater than 8 km/h (5 mph) for at least 2.5 seconds.

OBDII Code C1205 Cadillac - Right Front Wheel Speed Sensor Input Signal Equals Zero - AutoCodes.com — C1205 Cadillac Code - Right Front Wheel Speed Sensor Input Signal Equals Zero

What does this mean?

What are the Possible Causes of the DTC C1205 Cadillac?

Faulty Right Front Wheel Speed Sensor
Right Front Wheel Speed Sensor harness is open or shorted
Right Front Wheel Speed Sensor circuit poor electrical connection
Faulty Electronic Brake Control Module (EBCM)

How to Fix the DTC C1205 Cadillac?

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 C1205 Cadillac 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1205 Cadillac Code

1. What does the OBDII code C1205 mean on a Cadillac?

The code C1205 indicates that the right front wheel speed sensor is not sending a signal to the ABS module, meaning the sensor input equals zero.

2. What are the common symptoms of the C1205 code?

Common symptoms include the ABS or traction control warning light turning on, reduced ABS functionality, and possible loss of traction control.

3. What causes the C1205 code on a Cadillac?

Causes may include a faulty right front wheel speed sensor, damaged wiring or connectors, debris on the sensor, or a malfunctioning ABS module.

4. How can I diagnose the C1205 code?

Start by inspecting the right front wheel speed sensor and its wiring for visible damage. Use a multimeter to test the sensor's resistance and verify connectivity to the ABS module.

5. Can I drive my Cadillac with the C1205 code active?

Yes, you can drive the vehicle, but the ABS and traction control systems may not function properly, which could affect braking performance in slippery conditions.

6. How do I fix the C1205 code on my Cadillac?

Repairs may include replacing the right front wheel speed sensor, repairing damaged wiring or connectors, or cleaning debris from the sensor area.

7. How much does it cost to repair the C1205 code?

Repair costs can vary, but replacing a wheel speed sensor typically costs between $100 and $300, including parts and labor.

8. Can a dirty wheel speed sensor cause the C1205 code?

Yes, dirt, debris, or metal particles on the sensor or its tone ring can interfere with proper signal transmission, triggering this code.

9. How do I prevent the C1205 code from reoccurring?

Regularly inspect and clean the wheel speed sensors and ensure the wiring and connectors are free from damage or corrosion.

10. Does the C1205 code require reprogramming the ABS module after repairs?

In most cases, no reprogramming is needed. After repairs, clearing the code with a scan tool should restore normal functionality if the issue is resolved.