AutoCodes – Toyota – P0136 1999 Toyota Camry

P0136 1999 Toyota Camry Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

Quick Answer

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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 1999 Toyota Camry indicates Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2.
Common causes
Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 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.
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Code Popularity 12,904
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0136 1999 Toyota Camry Description

The heated oxygen sensor 2 (HO2S), after three way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. For optimum catalyst operation, the air fuel mixture (air-fuel ratio) must be maintained near the ideal stoichiometric ratio. The HO2S output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Engine Control Module (ECM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S generates a voltage between 0.1 and 0.9 V in response to oxygen in the exhaust gas. If the oxygen in the exhaust gas increases, the air-fuel ratio becomes Lean. The ECM interprets Lean when the HO2S voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The ECM interprets Rich when the HO2S voltage is above 0.45 V.
OBDII Code P0136 1999 Toyota Camry - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 - AutoCodes.com
P0136 1999 Toyota Camry Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

What are the Possible Causes of the DTC P0136 1999 Toyota Camry?

  • Faulty Rear Heated Oxygen Sensor Bank 1
  • Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
  • Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
  • Inappropriate fuel pressure
  • Faulty fuel injectors
  • Intake air leaks may be faulty
  • Exhaust gas leaks

How to Fix the DTC P0136 1999 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0136 1999 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 P0136 1999 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 P0136 1999 Toyota Camry Code

1. What is OBDII code P0136 for a 1999 Toyota Camry indicating?

This code, P0136, specifically points to a Heated Oxygen Sensor Circuit Malfunction in Bank 1 Sensor 2 of the vehicle.

2. What are common symptoms of a P0136 code in a 1999 Toyota Camry?

Common symptoms include poor fuel economy, rough idling, a decrease in engine performance, and the illumination of the check engine light.

3. What are the possible causes of a P0136 code in a 1999 Toyota Camry?

Potential causes of this code include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the vehicle's engine control module (ECM).

4. How can I diagnose the source of a P0136 code in my 1999 Toyota Camry?

To diagnose the issue, you can use an OBDII scanner to read the code, inspect the oxygen sensor and its wiring for damage, check for exhaust leaks, and test the sensor's voltage and resistance.

5. Can I drive my 1999 Toyota Camry with a P0136 code?

It is not recommended to drive your vehicle for an extended period with a P0136 code, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter over time.

6. How can I repair a P0136 code in my 1999 Toyota Camry?

Repair options include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, and resetting the check engine light with an OBDII scanner after the issue is addressed.

7. Is it necessary to replace the oxygen sensor to fix a P0136 code in a 1999 Toyota Camry?

In many cases, replacing the oxygen sensor in Bank 1 Sensor 2 is the most effective way to resolve a P0136 code and restore proper vehicle performance.

8. How much does it typically cost to repair a P0136 code in a 1999 Toyota Camry?

The cost of repairing a P0136 code can vary depending on the exact cause of the issue and whether you choose to do the repairs yourself or take your vehicle to a mechanic. Costs may range from around $100 to $300 or more.

9. Can a P0136 code in a 1999 Toyota Camry cause the vehicle to fail an emissions test?

Yes, a P0136 code can cause your vehicle to fail an emissions test due to the impact on the vehicle's emissions control system and the increased levels of pollutants being released.

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