P0136 2018 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 2018 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 2018 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 2018 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 2018 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 2018 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 2018 Toyota RAV4 Code
1. What does the OBDII code P0136 for a 2018 Toyota RAV4 mean?
- The code indicates an Oxygen Sensor Circuit Malfunction for Bank 1 Sensor 2 in the vehicle's exhaust system.
2. What are common symptoms of a P0136 code in a 2018 Toyota RAV4?
- Common symptoms include poor fuel economy, rough idling, engine hesitation, and an illuminated check engine light.
3. What are the possible causes of a P0136 code in a 2018 Toyota RAV4?
- Potential causes include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust system leaks, or a damaged catalytic converter.
4. How can I diagnose a P0136 code in my 2018 Toyota RAV4?
- Diagnosing the code may involve checking the oxygen sensor's wiring and connectors, inspecting the exhaust system for leaks, and testing the sensor's voltage and response.
5. Can I drive my 2018 Toyota RAV4 with a P0136 code?
- It is generally not recommended to drive with a P0136 code as it can lead to reduced fuel efficiency and potential damage to the vehicle's catalytic converter.
6. How can I repair a P0136 code in my 2018 Toyota RAV4?
- Repair options may include replacing the oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or replacing the catalytic converter if necessary.
7. Are there any DIY tips for fixing a P0136 code in a 2018 Toyota RAV4?
- DIY tips may include checking and cleaning the sensor connectors, inspecting the wiring for damage, and ensuring proper installation of a new oxygen sensor.
8. How much does it cost to fix a P0136 code in a 2018 Toyota RAV4?
- The cost of fixing a P0136 code can vary depending on the specific issue, but it may range from $100 to $500 for parts and labor.
9. How long does it take to repair a P0136 code in a 2018 Toyota RAV4?
- The repair time for a P0136 code can vary based on the exact cause, but it typically takes a few hours to a full day to diagnose and fix the issue.
10. Can a P0136 code in a 2018 Toyota RAV4 affect the vehicle's emissions or performance?
- Yes, a P0136 code can impact emissions levels and engine performance, potentially leading to increased emissions and reduced overall vehicle efficiency.
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