Quick Answer
C0122 means: DTC C0122 signifies a malfunction in the ABS wheel speed sensor circuit, which can affect braking performance.
Can I drive with C0122? Immediate attention is recommended to ensure vehicle safety.
Common Questions
What does C0122 mean and how does it affect my car?
C0122 indicates a problem with the wheel speed sensor in your ABS system. This issue can compromise your braking system's effectiveness, increasing the risk of accidents. It’s crucial to address this fault to maintain safe driving conditions.
What are the most common causes of C0122 and how much does it cost to fix?
The most common cause of C0122 is a faulty wheel speed sensor, which typically costs between $100 and $300 to replace. Other causes include damaged wiring and ABS module issues, with repair costs varying based on the specific problem.
Can I drive my car with C0122 or should I stop immediately?
Driving with C0122 is not advisable as it can affect your braking performance. It's best to have the vehicle inspected as soon as possible to prevent potential safety issues.
How can I diagnose C0122 myself using GeekOBD APP?
To diagnose C0122 with the GeekOBD APP, connect it to your vehicle's OBD2 port, scan for DTCs, and review the freeze frame data. Look for any abnormalities in wheel speed readings to pinpoint the issue.
What vehicles are most commonly affected by C0122?
DTC C0122 is most commonly reported in vehicles such as the 2005-2010 Chevrolet Silverado and the 2004-2009 GMC Sierra, among others. These models often face issues with their ABS wheel speed sensors.
How can I prevent C0122 from happening again?
To prevent C0122, regularly inspect your vehicle's ABS components, keep sensors clean, and ensure wiring is intact. Routine brake system maintenance can also help avoid future issues.
What is C0122?
DTC C0122 indicates a malfunction in the wheel speed sensor circuit, specifically in the Anti-lock Braking System (ABS). This code is commonly encountered in vehicles like the 2005-2010 Chevrolet Silverado and the 2004-2009 GMC Sierra. The wheel speed sensor is crucial for the ABS to function correctly, as it provides real-time data on the speed of each wheel to the vehicle's computer. When this data is inaccurate or missing, the ABS may not engage properly during braking, leading to potential safety hazards. Drivers may experience issues such as the ABS warning light illuminating on the dashboard, and in some cases, the traction control system might also be disabled. Ignoring this code can lead to longer stopping distances and reduced control of the vehicle in slippery conditions. It’s essential for car owners to address this issue promptly to ensure the safety of their vehicle and its occupants.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0122 is present:
- ABS warning light on the dashboard remains illuminated, indicating a fault in the braking system.
- Loss of traction control functionality, which can lead to skidding or loss of control during slippery conditions.
- Increased stopping distances, particularly noticeable when braking on wet or icy roads.
- Unusual noises from the ABS module during braking, suggesting potential internal issues.
- Vibration or pulsation felt through the brake pedal when applying brakes, indicating possible sensor malfunction.
Possible Causes
Most common causes of C0122 (ordered by frequency):
- Faulty wheel speed sensor, which is the most common cause at about 60% likelihood, typically due to wear or damage.
- Damaged wiring or connector issues, which can occur from exposure to elements or corrosion, accounting for approximately 25% of cases.
- Faulty ABS module or control unit, a less common cause but can lead to a complete failure of the ABS system.
- Brake system hydraulic issues that can cause erratic sensor readings, which are rarer but serious.
- Poor ground connection affecting sensor performance, which is infrequent but can cause intermittent problems.
C0122 Repair Costs
Cost Breakdown by Repair Type
Wheel Speed Sensor Replacement
Replacing the faulty wheel speed sensor with a new OEM part.
- Total: $100 - $300
- Success rate: 90%
Wiring Repair
Repairing damaged wiring or connections to ensure proper sensor function.
- Total: $50 - $150
- Success rate: 85%
ABS Module Replacement
Replacing the ABS control module if found to be faulty.
- Total: $300 - $800
- Success rate: 95%
Money-Saving Tips for C0122
- 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 C0122 Diagnosis Process
Follow these systematic steps to accurately diagnose C0122. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)
Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes).
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)
Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes).
Step 3: Step 3: Component testing - Use multimeter or specific diagnostic tools to test the wheel speed sensor and wiring (20-30 minutes)
Step 3: Component testing - Use multimeter or specific diagnostic tools to test the wheel speed sensor and wiring (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes).
Step 5: Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success and monitor ABS performance (15-20 minutes)
Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success and monitor ABS performance (15-20 minutes).
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: 2007 Chevrolet Silverado ABS Sensor Replacement
Vehicle: 2007 Chevrolet Silverado, 85,000 miles
Problem: Customer reported ABS light on and poor braking performance.
Diagnosis: OBD2 scan revealed DTC C0122; inspection showed a faulty wheel speed sensor.
Solution: Replaced the wheel speed sensor and cleared the codes.
Cost: $150 (sensor: $100, labor: $50)
Result: ABS warning light turned off, normal braking performance restored.
Case Study 2: 2010 GMC Sierra Wiring Repair
Vehicle: 2010 GMC Sierra, 90,000 miles
Problem: ABS light on, intermittent brake issues.
Diagnosis: Found damaged wiring to the wheel speed sensor causing signal loss.
Solution: Repaired wiring and reconnected the sensor.
Cost: $100 (labor: $50, wiring: $50)
Result: ABS system functioning properly, warning light off.