P0137 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 Toyota RAV4 Code
1. What does the OBDII code P0137 mean on a 2016 Toyota RAV4?
P0137 indicates that the oxygen sensor in Bank 1, Sensor 2, is reporting a low voltage, suggesting the sensor is detecting a lean condition or has malfunctioned.
2. What are the symptoms of code P0137 on a 2016 Toyota RAV4?
Common symptoms include poor fuel efficiency, a check engine light, rough idle, and in some cases, reduced engine performance.
3. What causes the P0137 code in a 2016 Toyota RAV4?
Possible causes include a faulty downstream oxygen sensor (Bank 1, Sensor 2), damaged wiring or connectors, exhaust leaks, or an issue with the engine control module (ECM).
4. Is it safe to drive a 2016 Toyota RAV4 with code P0137?
While it may be safe to drive short-term, prolonged driving with this code can lead to poor fuel economy and potential damage to the catalytic converter.
5. How do you fix the P0137 code on a 2016 Toyota RAV4?
Repairs may involve replacing the Bank 1, Sensor 2 oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or updating the ECM if necessary.
6. How do you locate Bank 1, Sensor 2 on a 2016 Toyota RAV4?
Bank 1 refers to the side of the engine with cylinder 1, and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.
7. Can a dirty air filter cause the P0137 code on a 2016 Toyota RAV4?
A dirty air filter is unlikely to cause P0137, but it can contribute to engine performance issues that may trigger other codes.
8. How can I prevent the P0137 code from occurring on my 2016 Toyota RAV4?
Regular maintenance, such as inspecting oxygen sensors, checking for exhaust leaks, and keeping connectors and wires in good condition, can help prevent this code.
9. How much does it cost to fix the P0137 code on a 2016 Toyota RAV4?
Repair costs vary but typically range from $150 to $400, depending on whether the oxygen sensor needs replacement or if additional repairs are required.
10. Can a bad catalytic converter cause the P0137 code on a 2016 Toyota RAV4?
While uncommon, a failing catalytic converter can sometimes affect the downstream oxygen sensor readings and trigger the P0137 code.
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