C0155 - Understanding and Fixing the Common Code in 2010-2015 Chevrolet Silverado and GMC Sierra

Quick Answer

C0155 means: DTC C0155 indicates a problem with the steering angle sensor circuit, affecting stability control.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C0155? Immediate attention is recommended to avoid compromising vehicle safety.

Common Questions

What does C0155 mean and how does it affect my car?

DTC C0155 signifies a problem with the steering angle sensor circuit. This can affect your car's stability control, making it harder to handle the vehicle, especially during adverse weather conditions. If not addressed, it may lead to further complications with the vehicle's handling and safety features.

What are the most common causes of C0155 and how much does it cost to fix?

Common causes of C0155 include a faulty steering angle sensor, damaged wiring, or a miscalibrated sensor. Repair costs typically range from $150 to $1,200 depending on the necessary repairs, with sensor replacement being the most common and cost-effective solution.

Can I drive my car with C0155 or should I stop immediately?

While you may be able to drive your car with DTC C0155, it is not advisable due to potential safety hazards. The vehicle's stability control may be compromised, increasing the risk of accidents. It's best to have the issue diagnosed and repaired as soon as possible.

How can I diagnose C0155 myself using GeekOBD APP?

To diagnose C0155 with the GeekOBD APP, connect the device to your vehicle's OBD2 port, run a scan to retrieve codes, and access freeze frame data for context. Check the wiring and sensor readings using the app's diagnostic features to pinpoint the issue.

What vehicles are most commonly affected by C0155?

DTC C0155 is often seen in vehicles like the 2010-2015 Chevrolet Silverado and GMC Sierra. Other models may also experience this code, particularly those with similar steering angle sensor setups.

How can I prevent C0155 from happening again?

To prevent DTC C0155, regularly check and maintain your steering system, ensure proper alignment, and watch for signs of corrosion or wear in the wiring. Regular vehicle maintenance can help catch these issues before they lead to trouble.

What is C0155?

DTC C0155 is a diagnostic trouble code that indicates a malfunction in the steering angle sensor circuit. This code can be particularly troublesome for drivers of vehicles like the 2010-2015 Chevrolet Silverado and GMC Sierra, as it directly impacts the vehicle's stability control system. The steering angle sensor plays a crucial role in providing data to the vehicle's electronic stability control (ESC) system by determining the angle of the steering wheel in relation to the direction of the vehicle. When this sensor fails or detects an issue, the C0155 code is triggered, often accompanied by the illumination of the check engine light. Common real-world implications of this code include the potential for reduced vehicle handling, increased risk of skidding in adverse conditions, and compromised safety features like traction control. Ignoring this code could lead to more severe issues down the line, including complete failure of the ESC, which may result in costly repairs and unsafe driving conditions. Therefore, addressing DTC C0155 promptly is essential for maintaining vehicle safety and performance.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0155 is present:

  • The check engine light remains illuminated, indicating a fault in the steering angle sensor.
  • Steering feels loose or unresponsive, making it difficult to maintain control of the vehicle during turns.
  • Traction control and stability control systems may disable, leading to a loss of vehicle stability in slippery conditions.
  • Unusual noises from the steering column, such as grinding or clicking sounds when turning the steering wheel.
  • Inconsistent steering response that may cause the vehicle to drift or pull to one side.

Possible Causes

Most common causes of C0155 (ordered by frequency):

  1. The most common cause of C0155 is a faulty steering angle sensor, with an estimated likelihood of 70%. This sensor may fail due to wear and tear over time or exposure to moisture.
  2. Another frequent cause is damaged wiring or connectors in the steering angle sensor circuit, which can account for around 20% of cases. Corrosion or fraying in the wires can lead to poor connectivity.
  3. In some instances, a miscalibrated steering angle sensor might trigger the code. Regular alignment checks can help prevent this issue.
  4. Less commonly, a malfunctioning electronic control unit (ECU) may be the culprit, though this is rare and usually indicates a more complex problem.
  5. Occasionally, the issue may arise from external factors such as vehicle accidents that damage the steering system components.

C0155 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor can resolve the C0155 code. This includes labor and part costs.

  • Total: $150 - $300
  • Success rate: 85%
Wiring Repair

Repairing damaged wiring or connectors in the steering angle sensor circuit.

  • Total: $100 - $200
  • Success rate: 90%
ECU Replacement

In rare cases, replacing the ECU may be necessary if it is determined to be the source of the issue.

  • Total: $500 - $1,200
  • Success rate: 70%
Money-Saving Tips for C0155
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional C0155 Diagnosis Process

Follow these systematic steps to accurately diagnose C0155. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Perform an initial visual inspection to check for damaged wiring, loose connections, or corrosion in the steering angle sensor circuit (5-10 minutes)

Step 1: Perform an initial visual inspection to check for damaged wiring, loose connections, or corrosion in the steering angle sensor circuit (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: Use the GeekOBD APP to conduct an OBD2 scan

Step 2: Use the GeekOBD APP to conduct an OBD2 scan. Retrieve all stored codes and freeze frame data to gather context regarding the fault (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Conduct component testing using a multimeter to verify the voltage and resistance of the steering angle sensor and associated wiring (20-30 minutes)

Step 3: Conduct component testing using a multimeter to verify the voltage and resistance of the steering angle sensor and associated wiring (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: Perform a system function test after any repairs are made to ensure everything operates correctly and clear the codes from the ECU (10-15 minutes)

Step 4: Perform a system function test after any repairs are made to ensure everything operates correctly and clear the codes from the ECU (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Drive the vehicle under various conditions to confirm that the repair was successful and no codes reappear (15-20 minutes)

Step 5: Drive the vehicle under various conditions to confirm that the repair was successful and no codes reappear (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Steering Angle Sensor Replacement on a 2013 Chevrolet Silverado

Vehicle: 2013 Chevrolet Silverado 1500, 85,000 miles

Problem: Customer reported a persistent check engine light and unresponsive steering.

Diagnosis: Diagnostic scan revealed DTC C0155. Visual inspection showed damaged wiring leading to the steering angle sensor.

Solution: Replaced the steering angle sensor and repaired wiring. Cleared codes and performed a system test.

Cost: $250 (parts: $150 for the sensor, $100 for labor)

Result: The check engine light turned off, and steering responsiveness returned to normal.

Case Study 2: Wiring Repair in a 2011 GMC Sierra

Vehicle: 2011 GMC Sierra 1500, 90,000 miles

Problem: Driver experienced erratic steering behavior and traction control light activation.

Diagnosis: DTC C0155 was stored. Wiring inspection revealed corrosion at connector points.

Solution: Repaired the corroded wiring and ensured a secure connection. Cleared the code and tested the system.

Cost: $150 (labor only, as parts were minimal)

Result: The vehicle operated normally post-repair with no reoccurrence of the code.

Diagnose C0155

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: C0155
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes