Quick Answer
P0137 means: P0137 indicates low voltage from the downstream oxygen sensor, affecting fuel efficiency and emissions.
Can I drive with P0137? Address this issue promptly to avoid further engine damage and increased repair costs.
Common Questions
What does P0137 mean and how does it affect my car?
P0137 means that your vehicle's oxygen sensor is sending a low voltage signal to the engine control module. This can lead to poor fuel efficiency and increased emissions, affecting how well your car runs and its overall longevity.
What are the most common causes of P0137 and how much does it cost to fix?
The most common cause of P0137 is a faulty oxygen sensor, which can cost between $150 to $300 to replace. Other causes include damaged wiring and exhaust leaks, which can vary in repair costs.
Can I drive my car with P0137 or should I stop immediately?
While you can technically drive with P0137, it is not advisable as it can lead to reduced performance and higher emissions. It's best to get it diagnosed and repaired as soon as possible.
How can I diagnose P0137 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for trouble codes, view freeze frame data, and monitor the oxygen sensor readings in real-time to help identify issues.
What vehicles are most commonly affected by P0137?
Commonly affected vehicles include the 2010-2015 Toyota Camry, 2012-2016 Honda Accord, and various Ford and Chevrolet models from the same era.
How can I prevent P0137 from happening again?
Regular maintenance, including checking the exhaust system for leaks, ensuring electrical connections are clean and secure, and replacing the oxygen sensor as part of routine service can help prevent future occurrences.
What is P0137?
The diagnostic trouble code (DTC) P0137 indicates that the Engine Control Module (ECM) has detected a low voltage signal from the oxygen sensor circuit. Specifically, this code refers to the downstream oxygen sensor, which plays a crucial role in monitoring the exhaust gases after they leave the catalytic converter. When the ECM receives a voltage reading below the expected range, it triggers this trouble code. This situation can lead to a variety of problems, particularly affecting the vehicle's fuel efficiency and emissions performance. A malfunctioning oxygen sensor can cause the engine to run rich or lean, which not only impacts fuel economy but can also lead to increased emissions, triggering the check engine light. If left unaddressed, this issue may lead to further complications, including damage to the catalytic converter and reduced engine performance, which can be costly to repair. It's essential to understand that while P0137 is often associated with older models, it has also been reported in various makes and models, especially those produced between 2010 and 2016. Regular maintenance and timely diagnostics using tools like the GeekOBD APP can help identify and resolve these issues before they escalate.
System: P - Powertrain (Engine, Transmission, Emissions)
Symptoms
Common symptoms when P0137 is present:
- The check engine light illuminates continuously, indicating a persistent issue that needs immediate attention.
- The engine may hesitate during acceleration, which can be frustrating and could lead to unsafe driving conditions.
- You may notice a significant decrease in fuel economy, potentially dropping by 10-15%, resulting in higher fuel costs.
- Rough idling can occur, leading to a less smooth driving experience, which can be bothersome, especially in stop-and-go traffic.
- Increased emissions could be detected, potentially failing an emissions test, which can lead to additional fines and repair costs.
Possible Causes
Most common causes of P0137 (ordered by frequency):
- A faulty oxygen sensor is the most common cause of P0137, with a likelihood of about 60%. These sensors can degrade over time due to exposure to heat and contaminants.
- Damaged wiring or connectors in the oxygen sensor circuit can lead to low voltage readings. This can happen due to wear and tear or corrosion, especially in older vehicles.
- An exhaust leak before the oxygen sensor can introduce outside air, skewing the readings. Regularly check for exhaust system integrity to prevent this issue.
- Less common but serious is a failing catalytic converter, which can cause backpressure and affect sensor performance. Address any exhaust issues promptly to avoid this costly repair.
- In rare cases, a malfunctioning Engine Control Module (ECM) can misinterpret sensor signals, though this is less frequent and typically follows other issues.
P0137 Repair Costs
Cost Breakdown by Repair Type
Oxygen Sensor Replacement
Replacing the faulty downstream oxygen sensor with a new one.
- Total: $150 - $300
- Success rate: 85%
Wiring Repair
Repairing damaged wiring or connectors in the O2 sensor circuit.
- Total: $100 - $200
- Success rate: 75%
Catalytic Converter Replacement
If the catalytic converter is found to be faulty, it may need replacement.
- Total: $500 - $2,500
- Success rate: 90%
Money-Saving Tips for P0137
- 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 P0137 Diagnosis Process
Follow these systematic steps to accurately diagnose P0137. 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 oxygen sensor and its circuit for proper voltage (20-30 minutes)
Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the oxygen sensor and its circuit for 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 check for recurring codes (15-20 minutes)
Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and check for recurring codes (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: Toyota Camry Oxygen Sensor Replacement
Vehicle: 2013 Toyota Camry, 85,000 miles
Problem: Customer reported check engine light and poor fuel economy.
Diagnosis: After scanning with GeekOBD APP, P0137 was identified. Visual inspection showed a damaged oxygen sensor.
Solution: Replaced the downstream O2 sensor and cleared the codes.
Cost: $220 (sensor $180, labor $40)
Result: Customer reported improved fuel efficiency and no check engine light.
Case Study 2: Honda Accord Wiring Repair
Vehicle: 2014 Honda Accord, 75,000 miles
Problem: Check engine light was on; customer experienced rough idling.
Diagnosis: P0137 was found, and a visual check revealed frayed wiring in the O2 sensor circuit.
Solution: Repaired the wiring and replaced the oxygen sensor.
Cost: $150 (wiring repair $80, sensor $70)
Result: Vehicle ran smoothly post-repair, and the check engine light remained off.