P0137 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 Toyota RAV4 Code
1. What are the common symptoms of OBDII code P0137 in a 2014 Toyota RAV4?
- Common symptoms include poor fuel economy, rough idling, and potential stalling of the vehicle.
2. What does the OBDII code P0137 "Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2" mean in a 2014 Toyota RAV4?
- This code indicates that the oxygen sensor downstream of the catalytic converter in bank 1 is sending a low voltage signal to the engine control module.
3. What are the possible causes of OBDII code P0137 in a 2014 Toyota RAV4?
- Potential causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the engine control module.
4. How can I diagnose the OBDII code P0137 in my 2014 Toyota RAV4?
- Diagnosing this code involves inspecting the oxygen sensor, checking the wiring for damage, verifying the integrity of connectors, and looking for exhaust leaks.
5. Can I continue driving my 2014 Toyota RAV4 with the P0137 code?
- It is not recommended to drive with this code as it can lead to decreased fuel efficiency and potential engine performance issues.
6. How can I repair the OBDII code P0137 in my 2014 Toyota RAV4?
- Repair options include replacing the oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or addressing any issues with the engine control module.
7. Is it possible to reset the OBDII code P0137 in a 2014 Toyota RAV4 without fixing the underlying issue?
- While you can clear the code using an OBDII scanner, it is essential to address the root cause to prevent the code from reoccurring.
8. Will the P0137 code in a 2014 Toyota RAV4 cause the check engine light to illuminate?
- Yes, this code typically triggers the check engine light to come on as a warning to the driver that there is an issue with the oxygen sensor.
9. How long does it take to repair the P0137 code in a 2014 Toyota RAV4?
- The repair time can vary based on the specific cause of the code, but it typically takes a few hours to diagnose and fix the issue.
10. Can a DIY enthusiast fix the P0137 code in a 2014 Toyota RAV4?
- Depending on your skill level and access to tools, you may be able to address some causes like replacing the oxygen sensor, but more complex issues may require professional assistance.
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