Quick Answer
C0659 means: DTC C0659 signals a malfunction with the vehicle speed sensor.
Can I drive with C0659? Immediate attention is recommended to prevent further damage.
Common Questions
What does C0659 mean and how does it affect my car?
The C0659 code indicates a problem with your vehicle's speed sensor, which can lead to erratic transmission behavior, incorrect speed readings, and poor fuel efficiency. If left unresolved, it could potentially cause further damage to your vehicle's transmission.
What are the most common causes of C0659 and how much does it cost to fix?
The primary causes include a faulty speed sensor, wiring issues, and corrosion. Repair costs can range from $100 to $300 for sensor replacement, and about $50 to $150 for wiring repairs, depending on the severity of the damage.
Can I drive my car with C0659 or should I stop immediately?
While it's possible to drive with a C0659 code, it is not advisable. The vehicle may exhibit erratic behavior, and prolonged driving could lead to more significant transmission issues. It's best to have it diagnosed and repaired as soon as possible.
How can I diagnose C0659 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for diagnostic trouble codes and view freeze frame data to understand when the fault occurs. Check the VSS readings in real time to see if they align with your vehicle's speed. This will help you pinpoint whether the sensor or wiring is the issue.
What vehicles are most commonly affected by C0659?
Commonly affected vehicles include the 2007-2013 Chevrolet Silverado, 2007-2013 GMC Sierra, and 2007-2014 Cadillac Escalade. These models often experience speed sensor issues due to age and wear.
How can I prevent C0659 from happening again?
Regular maintenance, including checking electrical connections and keeping the vehicle clean, can help prevent C0659. Additionally, using high-quality transmission fluid and addressing any leaks promptly will prolong the life of the speed sensor.
What is C0659?
The DTC C0659 code indicates a malfunction with the vehicle speed sensor (VSS), particularly in General Motors (GM) vehicles, including popular models like the Chevrolet Silverado (2007-2013), GMC Sierra (2007-2013), and Cadillac Escalade (2007-2014). The vehicle speed sensor is responsible for monitoring the speed of your vehicle and relaying this information to the engine control module (ECM) and the transmission control module (TCM). When the VSS fails, it can result in erratic transmission behavior, poor engine performance, and can even lead to the check engine light illuminating on your dashboard. Drivers may notice symptoms such as rough shifting or a decrease in fuel efficiency, making it crucial to address this issue promptly. Ignoring the C0659 code can lead to more severe problems down the line, including potential transmission failure. To prevent these complications, it's essential to diagnose and repair the root cause of the error as soon as possible, ensuring optimal vehicle performance and safety.
System: C - Chassis (ABS, Steering, Suspension)
Symptoms
Common symptoms when C0659 is present:
- Check engine light illuminates and remains on, indicating a potential issue with the vehicle speed sensor.
- Erratic speedometer readings, where the speedometer may fluctuate or display incorrect speeds while driving.
- Transmission shifts become rough or delayed, leading to a feeling of hesitation during acceleration.
- Decreased fuel economy, as the engine may not operate efficiently without accurate speed data.
- Potential for the vehicle to enter 'limp mode,' reducing power and limiting speed to prevent further damage.
Possible Causes
Most common causes of C0659 (ordered by frequency):
- A faulty vehicle speed sensor is the most common cause, accounting for about 70% of C0659 occurrences. This can be due to wear and tear or damage from road debris.
- Wiring issues, such as frayed wires or poor connections leading to signal loss, are the second most frequent cause. Regular inspections can help prevent this.
- Corrosion at the connector points can disrupt the signal transmission. Keeping electrical connections clean can help prevent this issue.
- Less common but serious causes include transmission fluid contamination that can impair sensor function and trigger the code.
- Rarely, a malfunctioning engine control module (ECM) can misinterpret the sensor signals, leading to a false C0659 reading.
C0659 Repair Costs
Cost Breakdown by Repair Type
Vehicle Speed Sensor Replacement
Replacing the vehicle speed sensor is the primary solution, which involves removing the old sensor and installing a new one.
- Total: $100 - $300
- Success rate: 95%
Wiring Repair
If the issue is related to wiring, this option involves repairing or replacing damaged wires or connectors.
- Total: $50 - $150
- Success rate: 90%
Money-Saving Tips for C0659
- 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 C0659 Diagnosis Process
Follow these systematic steps to accurately diagnose C0659. 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 a multimeter or specific diagnostic tools to test the VSS and wiring for continuity and proper voltage (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the VSS and wiring for continuity and proper voltage (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 the vehicle under various conditions to confirm repair success and monitor speedometer accuracy (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor speedometer accuracy (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: Speed Sensor Replacement on a 2010 Chevrolet Silverado
Vehicle: 2010 Chevrolet Silverado LT, 85,000 miles
Problem: Customer reported check engine light on and fluctuating speedometer readings.
Diagnosis: Used GeekOBD APP to confirm C0659 code. Visual inspection revealed a damaged speed sensor.
Solution: Replaced the faulty vehicle speed sensor and cleared the codes.
Cost: $250 (sensor cost $150, labor $100)
Result: Customer reported improved performance and accurate speed readings after repair.
Case Study 2: Wiring Repair on a 2012 GMC Sierra
Vehicle: 2012 GMC Sierra SLT, 70,000 miles
Problem: Customer experienced rough shifting and check engine light illuminated.
Diagnosis: OBD2 scan revealed C0659; further inspection showed frayed wiring near the transmission.
Solution: Repaired the damaged wiring and ensured all connections were secure.
Cost: $120 (labor $50, wiring parts $70)
Result: Post-repair, the vehicle shifted smoothly and the check engine light remained off.