P0136 2017 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 2017 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 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) 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 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 P0136 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 P0136 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 P0136 2017 Toyota RAV4 Code
1. What does OBDII code P0136 mean on a 2017 Toyota RAV4?
P0136 indicates an issue with the oxygen sensor circuit for Bank 1 Sensor 2, which is located downstream of the catalytic converter.
2. What are the common symptoms of code P0136 on a 2017 Toyota RAV4?
Symptoms may include the check engine light turning on, reduced fuel efficiency, or failed emissions tests, although the vehicle might still run normally.
3. What causes the P0136 code on a 2017 Toyota RAV4?
Common causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, a failing catalytic converter, or an exhaust leak.
4. How do I fix code P0136 on my 2017 Toyota RAV4?
Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, fixing exhaust leaks, or addressing catalytic converter issues if necessary.
5. Can I drive my 2017 Toyota RAV4 with the P0136 code?
Driving with a P0136 code is generally safe in the short term, but it’s best to address the issue promptly to avoid potential damage to the catalytic converter or reduced fuel efficiency.
6. How do I locate Bank 1 Sensor 2 on a 2017 Toyota RAV4?
Bank 1 Sensor 2 is located downstream of the catalytic converter on the exhaust system, typically under the vehicle.
7. Will replacing the oxygen sensor always fix the P0136 code on a 2017 Toyota RAV4?
Not always. While a faulty oxygen sensor is a common cause, it’s important to inspect the wiring, connectors, and exhaust system for other potential issues.
8. How much does it cost to fix a P0136 code on a 2017 Toyota RAV4?
The cost can vary but typically ranges from $150 to $400, depending on whether just the sensor needs replacement or if additional repairs are needed.
9. Can a dirty air filter trigger the P0136 code on a 2017 Toyota RAV4?
No, a dirty air filter is unlikely to cause this code. P0136 specifically relates to the oxygen sensor circuit, not air intake issues.
10. Do I need a professional mechanic to fix the P0136 code on my 2017 Toyota RAV4?
While DIY repairs are possible for replacing the oxygen sensor, a professional mechanic may be needed to diagnose and fix more complex issues like wiring problems or a failing catalytic converter.
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