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C1170 Mercedes-Benz Code - Steering Angle Sensor Zero Point Variation

Quick Answer

The C1170 diagnostic trouble code (DTC) for Mercedes-Benz vehicles indicates a problem with the steering angle sensor zero point variation. Common causes include Steering angle sensor calibration error, Faulty steering angle sensor, Wiring or connection issues in the steering angle sensor circuit. 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
C1170 Mercedes-Benz indicates Steering Angle Sensor Zero Point Variation.
Common causes
Common causes include Steering angle sensor calibration error, Faulty steering angle sensor, Wiring or connection issues in the steering angle sensor circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code C1170 Mercedes-Benz Description

The C1170 diagnostic trouble code (DTC) for Mercedes-Benz vehicles indicates a problem with the steering angle sensor zero point variation. The steering angle sensor is a crucial component of the vehicle's stability control system, as it provides data on the steering wheel position and angle to the electronic stability program (ESP) system. This information is used to determine the vehicle's direction and stability, helping to prevent skidding and loss of control.

OBDII Code C1170 Mercedes-Benz - Steering Angle Sensor Zero Point Variation
C1170 Mercedes-Benz Code - Steering Angle Sensor Zero Point Variation

Common Causes of C1170 Mercedes-Benz

  1. Steering angle sensor calibration error
  2. Faulty steering angle sensor
  3. Wiring or connection issues in the steering angle sensor circuit
  4. Electronic control unit (ECU) software glitches
  5. Mechanical damage to the steering system components

Symptoms of C1170 Mercedes-Benz

  1. Illuminated ESP/BAS warning light on the dashboard
  2. Traction control system (TCS) or stability control system (ESC) malfunctions
  3. Steering wheel feels loose or unresponsive
  4. Vehicle pulls to one side while driving
  5. Difficulty maintaining control during sharp turns or sudden maneuvers

How to Fix C1170 Mercedes-Benz

  1. Perform a diagnostic scan to confirm the C1170 code and identify the specific cause of the issue.
  2. Calibrate the steering angle sensor using a professional diagnostic tool to reset the zero point variation.
  3. Inspect the wiring and connections related to the steering angle sensor for any signs of damage or corrosion, repairing or replacing as needed.
  4. If the steering angle sensor is found to be faulty, replace it with a new sensor from the manufacturer.
  5. Clear the DTC and perform a road test to ensure that the steering angle sensor zero point variation has been resolved.

Cost to Fix C1170 Mercedes-Benz

The cost of repairing a steering angle sensor zero point variation issue can vary depending on the specific cause of the problem and the labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate, so it's recommended to obtain quotes from multiple sources to get an accurate estimate. Additionally, prices may be higher at dealerships or in metropolitan areas, while independent shops may offer more competitive rates.

What does this mean?

Tech Notes for C1170 Mercedes-Benz

1. Determine whether ESP MK25 system is installed in vehicle. You can recognize externally whether the new ESP MK25 system or the old ESP MK20 system is installed by proceeding as follows:

In individual cases, it is possible for the ETC control module with part number 030 545 23 32 (EGS 52 Q01 or SW 14/01) to send erroneous data on the CAN-C bus after switching on the ignition

- One pressure sensor on master brake cylinder: ESP MK25 (new)

- Two pressure sensors on master brake cylinder: ESP MK20 (old)

A further recognition characteristic on the MK25 system is the new combined yaw rate/lateral acceleration sensor. The electronic stability program (ESP) receives this data and then erroneously assumes that the steering angle sensor signal came from the steering tube module rather than the combined yaw rate/lateral acceleration sensor, However, since the steering tube module is not currently installed in model 203, the ESP control module does not receive any data and stores the DTC specified in the document. Conversion from MK20 to MK25 was accomplished on approx. 08/2001, however, some preliminary vehicles were produced It is therefore important to differentiate on the basis of the number of pressure sensors present on the master brake cylinder.



2. Remove/install/replace ETC control module











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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 C1170 Mercedes-Benz Code

1. What are the common symptoms of OBDII code C1170 in a Mercedes-Benz related to the Steering Angle Sensor Zero Point Variation?

The common symptoms include the ABS warning light staying illuminated, stability control issues, and potential loss of power steering assistance.

2. What typically causes the OBDII code C1170 in a Mercedes-Benz?

The code C1170 is usually triggered by a discrepancy between the actual steering angle and the expected steering angle, often due to a fault in the steering angle sensor or its calibration.

3. How can I diagnose the Steering Angle Sensor Zero Point Variation issue in my Mercedes-Benz?

Professional diagnostic tools can help read the OBDII code C1170 and perform a calibration procedure to reset the steering angle sensor to its zero point.

4. Is it safe to continue driving my Mercedes-Benz with the C1170 error code present?

It is not recommended to drive the vehicle with the C1170 code active, as it can affect the operation of important safety systems like ABS and stability control.

5. Can I reset the Steering Angle Sensor calibration myself to clear the C1170 error code?

While it is possible to attempt a sensor calibration reset yourself, it is advisable to consult a qualified technician to ensure the procedure is done correctly and to rule out any underlying issues.

6. How much does it typically cost to repair the Steering Angle Sensor Zero Point Variation issue in a Mercedes-Benz?

The cost of repairing the C1170 code can vary depending on the exact cause of the problem, but it may involve sensor replacement, calibration, or software updates, which can range from a few hundred to over a thousand dollars.

7. Are there any DIY tips or tricks to prevent the recurrence of the C1170 error in my Mercedes-Benz?

Regularly checking the steering system for any physical damage or loose connections, and ensuring proper wheel alignment can help prevent issues with the steering angle sensor and reduce the likelihood of the C1170 code appearing.

8. Can extreme driving conditions or rough roads contribute to triggering the Steering Angle Sensor Zero Point Variation code in a Mercedes-Benz?

Driving on rough roads or harsh conditions can potentially impact the steering angle sensor calibration, leading to the activation of the C1170 code. It's essential to drive cautiously to avoid unnecessary stress on the steering system.

9. How long does it usually take to repair the Steering Angle Sensor Zero Point Variation issue in a Mercedes-Benz?

The repair time can vary based on the exact cause of the problem and the availability of parts. In general, it may take a few hours to a day for a qualified technician to diagnose and fix the issue.

10. Is the Steering Angle Sensor Zero Point Variation problem covered under any warranty for Mercedes-Benz vehicles?

Depending on the vehicle's age and warranty status, the repair for the C1170 code may be covered under the manufacturer's warranty or extended warranty. It's recommended to check with the dealership or your warranty provider for specific coverage details.

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