• Check Engine Light is on
• Poor fuel economy
• Failed emissions test
• Faulty oxygen sensor
• Damaged wiring or connectors
• Blown fuse for the heater circuit
ECM: Engine Control Module
OBD-II: On-Board Diagnostics II
• P1138
• P1139
O2 Sensor Heater Circuit Signal Intermittent (Bank 1 Sensor 2)
This code means that the car's computer is having trouble with the heater part of an oxygen sensor. It's like a little thermometer in the car's exhaust pipe that's not working right all the time.
The P1137 code is triggered when the Engine Control Module (ECM) detects an intermittent signal from the heater circuit of the oxygen sensor located in Bank 1, Sensor 2.
The oxygen sensor measures the amount of oxygen in the exhaust gases. The heater circuit helps the sensor reach the operating temperature quickly. An intermittent signal indicates that the heater circuit is not consistently providing the necessary heat, which can affect the sensor's performance.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the oxygen sensor heater circuit for continuity.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Replace any blown fuses in the heater circuit.
• OBD-II scanner
• Multimeter
• Socket set
$150 - $300
Moderate
• Ford F-150
• Toyota Camry
• Honda Accord
• Regularly inspect and maintain the exhaust system.
• Ensure timely replacement of oxygen sensors.
• Check wiring and connectors during routine maintenance.
Sensor Issue
• Get the vehicle inspected by a professional mechanic.
• Avoid ignoring the Check Engine Light.
• Consider regular maintenance to prevent future issues.
Oxygen sensors may be covered under the vehicle's emissions warranty.
Oxygen sensor issues have been common with vehicles as they age, especially in models with high mileage.
Moderate – While the vehicle may still operate, it can lead to poor fuel efficiency and potential emissions test failures.
Driving with a faulty oxygen sensor can lead to increased emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle in closed-loop operation
The oxygen sensor is located in the exhaust system, typically after the catalytic converter on Bank 1.
Q: Can I drive my car with a P1137 code?
A: While you can drive the car, it's not recommended as it can lead to poor fuel efficiency and emissions issues.
Q: How do I know if my oxygen sensor needs replacing?
A: Symptoms include a Check Engine Light, poor fuel economy, and failed emissions tests.
