P0136 2016 Toyota RAV4 Code - Oxygen Sensor Circuit Malfunction 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
- P0136 2016 Toyota RAV4 indicates Oxygen Sensor Circuit Malfunction 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 P0136 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) P0136 indicates the deterioration of the heated oxygen sensor. The ECM stores the DTC by calculating the impedance of the sensor when the typical enabling conditions are satisfied.
What are the Possible Causes of the DTC P0136 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 P0136 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 P0136 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 P0136 2016 Toyota RAV4 Code
1. What does the OBDII code P0136 mean on a 2016 Toyota RAV4?
P0136 indicates that there is a malfunction in the oxygen sensor circuit of Bank 1 Sensor 2. This sensor is located behind the catalytic converter and is primarily used to monitor the efficiency of the converter.
2. What are common symptoms of code P0136 in a 2016 Toyota RAV4?
Symptoms include a check engine light, lower fuel economy, rough engine idle, or a noticeable drop in engine performance.
3. What causes the P0136 code to appear on a 2016 Toyota RAV4?
Possible causes include a faulty oxygen sensor, damaged or corroded wiring or connectors for the oxygen sensor, exhaust leaks near the sensor, or a malfunctioning catalytic converter.
4. How can I fix the P0136 code in a 2016 Toyota RAV4?
Repair strategies include replacing the Bank 1 Sensor 2 oxygen sensor, repairing any damaged wiring or connectors, and checking for and repairing any exhaust leaks. If the catalytic converter is faulty, it may also need to be replaced.
5. Is it safe to drive a 2016 Toyota RAV4 with the P0136 code?
While you can usually still drive the vehicle, it's best to address the issue promptly to avoid potential long-term damage to the catalytic converter, which can be costly to replace.
6. How do I locate Bank 1 Sensor 2 on my 2016 Toyota RAV4?
Bank 1 Sensor 2 is located on the exhaust system behind the catalytic converter. It's accessible from beneath the vehicle, often towards the middle or rear.
7. What tools are needed to diagnose the P0136 code on a 2016 Toyota RAV4?
You'll need an OBDII scanner to read the code and live data, and potentially a multimeter for testing the sensor's voltage outputs and wiring continuity.
8. Can a bad oxygen sensor affect the performance of my 2016 Toyota RAV4?
Yes, a malfunctioning oxygen sensor can cause a decrease in fuel efficiency, increased emissions, and poor engine performance.
9. How often should the oxygen sensors be replaced in a 2016 Toyota RAV4?
Oxygen sensors typically last between 60,000 to 100,000 miles, but their lifespan can vary based on driving conditions and vehicle maintenance.
10. What is the difference between Bank 1 Sensor 2 and Bank 1 Sensor 1 on a 2016 Toyota RAV4?
Bank 1 Sensor 1 is located before the catalytic converter and primarily monitors the amount of oxygen in the exhaust to optimize combustion. Bank 1 Sensor 2 is located after the catalytic converter and monitors the efficiency of the converter itself.
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