P0137 2017 Toyota RAV4 Code - Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2
Quick Answer
In order to obtain a high purification rate of the Carbon Monoxide (CO), Hydrocarbon (HC), and Nitrogen Oxide (NOx) components in the exhaust gas, a Three-Way Catalytic Converter (TWC) is used. Common causes include Faulty Oxygen Sensor Bank 1 Sensor 2, Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted, Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0137 2017 Toyota RAV4 indicates Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Oxygen Sensor Bank 1 Sensor 2, Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted, Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0137 2017 Toyota RAV4 Description
The heated oxygen sensor is located behind the TWC and detects the oxygen concentration in the exhaust gas. Since the sensor is integrated with the heater that heats the sensing portion, it is possible to detect the oxygen concentration even when the intake air volume is low (the exhaust gas temperature is low).
When the air-fuel ratio becomes lean, the oxygen concentration in the exhaust gas is high. The heated oxygen sensor informs the ECM that the post-TWC air-fuel ratio is lean (low voltage, i.e. less than 0.45 V).
Conversely, when the air-fuel ratio is richer than the stoichiometric air-fuel level, the oxygen concentration in the exhaust gas is low. The heated oxygen sensor informs the ECM that the post-TWC air-fuel ratio is rich (high voltage, i.e. more than 0.45 V). The heated oxygen sensor has the property of changing its output voltage drastically when the air-fuel ratio is close to the stoichiometric level.
The ECM uses the supplementary information from the heated oxygen sensor to determine whether the air-fuel ratio after the TWC is rich or lean and adjusts the fuel injection duration accordingly. Thus, if the heated oxygen sensor is working improperly due to internal malfunctions, the ECM is unable to compensate for deviations in the primary air-fuel ratio control.
The impedance cannot be measured using an ohmmeter. Diagnostic Trouble Code (DTC) P0137 indicates an open or short circuit in the heated oxygen sensor (2 driving cycles). The ECM stores the DTC when the impedance of the sensor exceeds the threshold 15 kΩ.
What are the Possible Causes of the DTC P0137 2017 Toyota RAV4?
- Faulty Oxygen Sensor Bank 1 Sensor 2
- Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted
- Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection
- Gas leak from exhaust system
How to Fix the DTC P0137 2017 Toyota RAV4?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0137 2017 Toyota RAV4 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0137 2017 Toyota RAV4 Code
1. What are the common symptoms of OBDII code P0137 in a 2017 Toyota RAV4?
- Common symptoms include poor fuel economy, rough idling, and a noticeable decrease in engine performance.
2. What does the OBDII code P0137 in a 2017 Toyota RAV4 indicate?
- This code indicates a low voltage condition in the oxygen sensor circuit of Bank 1 Sensor 2, which is located downstream of the catalytic converter.
3. What are the possible causes of OBDII code P0137 in a 2017 Toyota RAV4?
- Possible causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the engine's air-fuel mixture.
4. How can I diagnose the OBDII code P0137 in my 2017 Toyota RAV4?
- Diagnosis involves checking the oxygen sensor's voltage readings, inspecting the sensor's wiring and connectors, and looking for any exhaust system leaks that could affect sensor performance.
5. Can I continue to drive my 2017 Toyota RAV4 with OBDII code P0137?
- It is generally not recommended to drive the vehicle with this code active, as it can lead to decreased fuel efficiency and potential long-term engine damage.
6. How can I repair OBDII code P0137 in my 2017 Toyota RAV4?
- Repair options include replacing the oxygen sensor, repairing or replacing damaged wiring or connectors, fixing any exhaust leaks, and ensuring proper engine tune-up.
7. Are there any DIY tips for addressing OBDII code P0137 in a 2017 Toyota RAV4?
- DIY enthusiasts can start by inspecting the oxygen sensor wiring and connectors for damage, ensuring a tight connection, and checking for any visible exhaust leaks near the sensor.
8. Is it necessary to reset the OBDII code P0137 after repairs are made on a 2017 Toyota RAV4?
- Yes, it is advisable to reset the code using an OBDII scanner after repairs to clear the fault code and see if the issue has been successfully resolved.
9. How much does it typically cost to repair OBDII code P0137 in a 2017 Toyota RAV4 at a professional auto repair shop?
- The repair cost can vary depending on the exact cause of the issue, but it typically ranges from $150 to $400, including parts and labor.
10. What happens if OBDII code P0137 in a 2017 Toyota RAV4 is left unaddressed?
- Leaving this code unaddressed can lead to increased emissions, potential damage to the catalytic converter, and further issues with the vehicle's performance and fuel efficiency.
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