AutoCodes – Toyota – P0158 2006 Toyota Camry

P0158 2006 Toyota Camry Code - Oxygen Sensor Circuit High Voltage Bank 2 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 TWC is used. Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, EFI Relay, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted. 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: P0158 2006 Toyota Camry indicates Oxygen Sensor Circuit High Voltage Bank 2 Sensor 2.
Common causes: Common causes include Faulty Rear Heated Oxygen Sensor Bank 2, EFI Relay, Rear Heated Oxygen Sensor Bank 2 harness is open or shorted.
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.

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Code Popularity 3,639

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0158 2006 Toyota Camry Description

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 TWC is used. For the most efficient use of the TWC, the air-fuel ratio must be precisely controlled so that it is always close to the stoichiometric air-fuel level. For the purpose of helping the ECM to deliver accurate air-fuel ratio control, a Heated Oxygen (HO2) sensor is used.
The HO2 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 rich. The HO2 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 becomes lean. The HO2 sensor informs the ECM that the post-TWC air-fuel ratio is rich (high voltage, i.e. more than 0.45 V). The HO2 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 HO2 sensor to determine whether the air-fuel ratio after the TWC is rich or lean, and adjusts the fuel injection time accordingly. Thus, if the HO2 sensor is working improperly due to internal malfunctions, the ECM is unable to compensate for deviations in the primary air-fuel ratio control.

OBDII Code P0158 2006 Toyota Camry - Oxygen Sensor Circuit High Voltage Bank 2 Sensor 2 - AutoCodes.com — P0158 2006 Toyota Camry Code - Oxygen Sensor Circuit High Voltage Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0158 2006 Toyota Camry?

Faulty Rear Heated Oxygen Sensor Bank 2
EFI Relay
Rear Heated Oxygen Sensor Bank 2 harness is open or shorted
Rear Heated Oxygen Sensor Bank 2 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors
Intake air leaks
Exhaust gas leaks

How to Fix the DTC P0158 2006 Toyota Camry?

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.

What does this mean?

Code Tech Notes

Replacing the Rear Heated Oxygen Sensor Bank 2 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0158 2006 Toyota Camry 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.

Need more information about the P0158 2006 Toyota Camry code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0158 2006 Toyota Camry Code

1. What are the common symptoms of OBDII code P0158 in a 2006 Toyota Camry?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine light.

2. What does the OBDII code P0158 for a 2006 Toyota Camry indicate?

- The code P0158 indicates a high voltage condition in the oxygen sensor circuit of Bank 2 Sensor 2 in the exhaust system.

3. What are the possible causes of OBDII code P0158 in a 2006 Toyota Camry?

- Potential causes include a faulty oxygen sensor, wiring issues in the sensor circuit, exhaust leaks, or a malfunctioning engine control module (ECM).

4. How can I diagnose the OBDII code P0158 in my 2006 Toyota Camry?

- Diagnose the code by checking the oxygen sensor's wiring, inspecting the sensor for physical damage, and testing the sensor's voltage output using a multimeter.

5. Can I still drive my 2006 Toyota Camry with OBDII code P0158?

- It is generally safe to drive the vehicle for a short period if the symptoms are mild, but it is recommended to address the issue promptly to prevent further damage and ensure optimal performance.

6. How do I repair OBDII code P0158 in a 2006 Toyota Camry?

- Repair options include replacing the faulty oxygen sensor, repairing any damaged wiring, fixing exhaust leaks, or resetting the ECM after addressing the root cause of the high voltage condition.

7. Will resetting the Check Engine light resolve OBDII code P0158 in my 2006 Toyota Camry?

- Simply resetting the light will not fix the underlying issue causing the code. It is important to diagnose and repair the problem to prevent the code from reoccurring.

8. Can a dirty or contaminated oxygen sensor trigger OBDII code P0158 in a 2006 Toyota Camry?

- Yes, a dirty or contaminated oxygen sensor can cause inaccurate voltage readings and trigger the high voltage condition indicated by code P0158.

9. Is it necessary to use a genuine Toyota oxygen sensor to replace Bank 2 Sensor 2 in a 2006 Camry?

- While using a genuine Toyota sensor is recommended for optimal performance, high-quality aftermarket sensors can also be used as long as they meet or exceed OEM specifications.

10. How long does it typically take to repair OBDII code P0158 in a 2006 Toyota Camry?

- The repair time can vary depending on the exact cause of the code and the extent of the repairs needed. It can range from 30 minutes to a few hours, including diagnosis and sensor replacement.