Quick Answer
P0371 means: P0371 indicates a problem with the timing reference high resolution signal, affecting engine timing.
Can I drive with P0371? Immediate attention needed to prevent potential engine damage.
Common Questions
What does P0371 mean and how does it affect my car?
P0371 indicates a problem with the timing reference high resolution signal, which is essential for the engine's timing. If this signal is disrupted, it can lead to poor engine performance, stalling, and increased emissions. Long-term, ignoring this code can result in more severe engine damage, making it crucial to address promptly.
What are the most common causes of P0371 and how much does it cost to fix?
Common causes of P0371 include faulty crankshaft or camshaft position sensors, damaged wiring, and occasionally a malfunctioning ECM. Repair costs can vary widely, ranging from $100 for simple wiring fixes to over $1,200 for ECM replacements.
Can I drive my car with P0371 or should I stop immediately?
While you might be able to drive short distances, it’s not advisable to ignore the P0371 code. Continuing to drive can lead to significant engine problems, including stalling and reduced performance. It's best to get your vehicle checked as soon as possible.
How can I diagnose P0371 myself using GeekOBD APP?
To diagnose P0371 using the GeekOBD APP, start by connecting the app to your vehicle's OBD2 port. Retrieve codes and note any freeze frame data. Check the live data for sensor readings related to the crankshaft and camshaft. This can help you identify specific faults and guide your repairs.
What vehicles are most commonly affected by P0371?
P0371 is frequently reported in vehicles like the 2015-2018 Honda Civic, 2014-2018 Toyota Corolla, and other models with similar engine management systems. Always check for recalls or technical service bulletins (TSBs) related to your specific vehicle.
How can I prevent P0371 from happening again?
To prevent P0371 from recurring, ensure regular maintenance checks of your engine's timing components and sensors. Keep an eye on wiring integrity and replace parts as they show signs of wear. Regular oil changes can also help maintain the health of engine components.
What is P0371?
The diagnostic trouble code (DTC) P0371 indicates a problem with the timing reference high resolution signal. This code is commonly found in models like the 2015-2018 Honda Civic and 2014-2018 Toyota Corolla. The timing reference signal is crucial for the engine control module (ECM) to manage engine timing accurately. When this signal is disrupted, the ECM may not be able to determine the precise position of the crankshaft or camshaft, leading to engine performance issues. Drivers may notice symptoms like a lack of power, misfires, or even stalling. If left unaddressed, this issue can lead to further engine damage, decreased fuel efficiency, and increased emissions. The code often triggers the check engine light, prompting owners to seek diagnostics. Understanding this DTC is vital because it can help prevent costly repairs and maintain optimal vehicle performance. Effective troubleshooting involves checking the integrity of the timing sensors, wiring, and the ECM itself. If you suspect your vehicle has this code, it's essential to take immediate action to avoid further complications.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0371 is present:
- Check engine light illuminates continuously, indicating a fault that needs attention.
- Engine stutters or hesitates during acceleration, making driving uncomfortable and potentially unsafe.
- Fuel economy drops noticeably, with many drivers reporting decreases of 10-20%, leading to higher fuel costs.
- Vehicle may experience unexpected stalling, particularly during stop-and-go traffic, posing safety risks.
- Rough idling or engine misfires occur, resulting in a less smooth driving experience.
Possible Causes
Most common causes of P0371 (ordered by frequency):
- Faulty crankshaft or camshaft position sensor, which accounts for approximately 60% of P0371 cases. These sensors can fail due to wear or damage.
- Damaged wiring or poor connections. Corrosion and fraying can disrupt signals, accounting for about 25% of cases.
- Faulty engine control module (ECM) can lead to the P0371 code, though this is less common, making up about 10% of occurrences. Regular updates can prevent this.
- Less common but serious: Timing belt or chain issues, which can lead to severe engine damage if not addressed.
- Rarely, a malfunctioning ignition system can cause inconsistent timing signals, but this is infrequent.
P0371 Repair Costs
Cost Breakdown by Repair Type
Crankshaft Position Sensor Replacement
Replacing a faulty crankshaft position sensor is often necessary to resolve the P0371 code.
- Total: $150 - $300
- Success rate: 90%
Wiring Repair or Replacement
Fixing damaged wiring or connectors can solve the issue as well.
- Total: $100 - $200
- Success rate: 80%
ECM Replacement
In rare cases, replacing the ECM may be necessary if it's faulty.
- Total: $600 - $1,200
- Success rate: 70%
Money-Saving Tips for P0371
- 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 P0371 Diagnosis Process
Follow these systematic steps to accurately diagnose P0371. 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 suspected components, especially sensors (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, especially sensors (20-30 minutes).
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes to see if the issue resolves (10-15 minutes)
Step 4: System function test - Verify proper operation after repairs and clear codes to see if the issue resolves (10-15 minutes).
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure no issues persist (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure no issues persist (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: Honda Civic P0371 Resolution
Vehicle: 2016 Honda Civic, 75,000 miles
Problem: Customer reported check engine light and engine stuttering during acceleration.
Diagnosis: Diagnostics revealed P0371 code. Visual inspection showed frayed wiring to the crankshaft position sensor.
Solution: Replaced the damaged wiring and the crankshaft position sensor.
Cost: $250 (including parts and labor)
Result: Engine performance improved, and the check engine light remained off post-repair.
Case Study 2: Toyota Corolla P0371 Case
Vehicle: 2017 Toyota Corolla, 50,000 miles
Problem: Driver experienced rough idling and occasional stalling.
Diagnosis: OBD2 scan confirmed P0371. Further testing indicated a faulty camshaft position sensor.
Solution: Replaced the camshaft position sensor and updated the ECM software.
Cost: $300 (parts and labor included)
Result: Stalling issues resolved, and the vehicle ran smoothly after the repair.