Quick Answer
P0339 means: P0339 indicates an issue with the Crankshaft Position Sensor A circuit.
Can I drive with P0339? Immediate attention is recommended to prevent further engine damage.
Common Questions
What does P0339 mean and how does it affect my car?
DTC P0339 indicates an issue with the Crankshaft Position Sensor A circuit, which can lead to engine performance problems like stalling or rough idling. It's essential to address this promptly to avoid further engine damage.
What are the most common causes of P0339 and how much does it cost to fix?
Common causes include a faulty crankshaft position sensor, damaged wiring, or a malfunctioning ECU. Repair costs vary, typically ranging from $100 to $400 depending on the specific issue.
Can I drive my car with P0339 or should I stop immediately?
Driving with P0339 can lead to serious engine issues and should be avoided. It's best to stop driving and have the vehicle diagnosed as soon as possible.
How can I diagnose P0339 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for codes and freeze frame data, helping you understand the context of the fault. Follow the diagnostic steps to test the sensor and wiring.
What vehicles are most commonly affected by P0339?
Commonly affected vehicles include the 2010-2018 Toyota Camry, 2012-2016 Honda Accord, and other models with similar engine layouts. Be sure to check for any recalls or technical service bulletins related to this code.
How can I prevent P0339 from happening again?
Regular maintenance such as timely oil changes, inspections of engine components, and keeping wiring connections clean can help prevent issues with the crankshaft position sensor.
What is P0339?
DTC P0339 indicates a problem with the Crankshaft Position Sensor A circuit, which is crucial for engine management systems in modern vehicles. This sensor is responsible for monitoring the position and speed of the crankshaft, sending this information to the engine control unit (ECU) to optimize engine timing and performance. When this code is triggered, it suggests an intermittent failure in the sensor or its circuit. This issue can lead to a variety of engine performance problems, such as rough idling, stalling, or difficulties during acceleration. Ignoring this code can result in more severe engine problems over time, including potential damage to the catalytic converter due to improper fuel-air mixture, which can increase repair costs significantly. Car owners may experience a check engine light, and it is advisable to address this code promptly to avoid further complications. In vehicles like the 2011 Honda Accord or 2015 Toyota Camry, this problem is particularly prevalent, making it essential for owners of these models to be aware of the symptoms and potential repairs needed.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0339 is present:
- The check engine light is illuminated constantly, indicating a fault in the engine management system.
- Drivers may notice engine hesitation during acceleration, making the car feel sluggish or unresponsive.
- Fuel economy may decrease significantly, often by 10-15%, as the ECU struggles to manage fuel flow effectively.
- The engine may stall unexpectedly, especially at idle or when coming to a stop.
- Rough idling can occur, causing vibrations and an uneven engine sound.
Possible Causes
Most common causes of P0339 (ordered by frequency):
- The most common cause is a faulty crankshaft position sensor, which can occur in about 60% of cases. This can happen due to wear and tear, exposure to heat, or contamination.
- Another common issue is damaged wiring or connectors in the sensor circuit, occurring in around 25% of cases. This often results from corrosion or physical damage.
- A third cause is a malfunctioning engine control unit (ECU), which is less common, but can happen in older vehicles. Preventative maintenance, such as regular inspections, can help avoid this.
- Less commonly, timing belt issues can lead to this code, particularly if the belt is worn or has jumped a tooth, affecting sensor readings.
- A rare but serious cause could be an internal engine fault, such as a damaged crankshaft, which would require extensive repairs.
P0339 Repair Costs
Cost Breakdown by Repair Type
Replace Crankshaft Position Sensor
This involves replacing the faulty sensor with a new unit to restore proper functionality.
- Total: $150 - $400
- Success rate: 85%
Repair Wiring or Connectors
Fixing any damaged wiring or connectors in the sensor circuit to ensure proper signal transmission.
- Total: $100 - $300
- Success rate: 75%
Money-Saving Tips for P0339
- 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 P0339 Diagnosis Process
Follow these systematic steps to accurately diagnose P0339. 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 to test the crankshaft position sensor output voltage and continuity (20-30 minutes)
Step 3: Component testing - Use a multimeter to test the crankshaft position sensor output voltage and continuity (20-30 minutes).
Step 4: Step 4: System function test - After any repairs, verify proper operation and clear codes using the GeekOBD APP (10-15 minutes)
Step 4: System function test - After any repairs, verify proper operation 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 for any recurring issues (15-20 minutes)
Step 5: Road test verification - Drive vehicle under various conditions to confirm repair success and monitor for any recurring issues (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: Crankshaft Sensor Replacement in a 2015 Toyota Camry
Vehicle: 2015 Toyota Camry, 75,000 miles
Problem: Customer reported the check engine light was on with symptoms of rough idling.
Diagnosis: Used the GeekOBD APP to retrieve code P0339. Visual inspection revealed a faulty crankshaft position sensor.
Solution: Replaced the crankshaft position sensor and cleared the code.
Cost: $250 (sensor $150, labor $100)
Result: Customer reported immediate improvement in engine performance and no recurrence of the check engine light.
Case Study 2: Wiring Repair on a 2012 Honda Accord
Vehicle: 2012 Honda Accord, 90,000 miles
Problem: Customer experienced intermittent stalling and check engine light illumination.
Diagnosis: Found damaged wiring in the crankshaft position sensor circuit during inspection.
Solution: Repaired the damaged wiring and ensured all connections were secure.
Cost: $180 (repair kit $30, labor $150)
Result: Stalling issues resolved and check engine light remained off during follow-up.