AutoCodes – Toyota – P0136 2000 Toyota Echo

P0136 2000 Toyota Echo Code - 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 2000 Toyota Echo indicates 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 6,370

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
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0136 2000 Toyota Echo 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 2000 Toyota Echo - Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 - AutoCodes.com — P0136 2000 Toyota Echo Code - Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0136 2000 Toyota Echo?

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 2000 Toyota Echo?

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 1 usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0136 2000 Toyota Echo 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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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 2000 Toyota Echo Code

1. What is OBDII code P0136 for a 2000 Toyota Echo?

Code P0136 indicates an Oxygen Sensor Circuit Malfunction in Bank 1 Sensor 2 of the vehicle.

2. What are the common symptoms of a P0136 code in a 2000 Toyota Echo?

Common symptoms may include poor fuel efficiency, rough idling, hesitation during acceleration, and the illumination of the Check Engine Light.

3. What are the possible causes of a P0136 code in a 2000 Toyota Echo?

Potential causes include a faulty oxygen sensor, damaged wiring or connectors in the oxygen sensor circuit, an exhaust leak, or a malfunctioning engine control module (ECM).

4. How can I diagnose a P0136 code in my 2000 Toyota Echo?

Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the ECM for proper functioning.

5. Can I continue driving my 2000 Toyota Echo with a P0136 code?

While it may be possible to drive with a P0136 code, it is not recommended 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 2000 Toyota Echo?

Repairs may involve replacing the oxygen sensor, repairing any damaged wiring or connectors, fixing exhaust leaks, or reprogramming the ECM if necessary.

7. Is it possible to reset the Check Engine Light after fixing a P0136 code on a 2000 Toyota Echo?

Yes, the Check Engine Light can be reset using an OBDII scanner after the issue causing the P0136 code has been resolved.

8. How much does it cost to fix a P0136 code in a 2000 Toyota Echo?

The cost of repairs for a P0136 code can vary depending on the specific issue, but it may range from $100 to $300 for parts and labor.

9. Can a P0136 code in a 2000 Toyota Echo cause emissions test failure?

Yes, a P0136 code can cause your vehicle to fail emissions testing due to increased emissions and improper functioning of the oxygen sensor.

10. How often should the oxygen sensors be replaced in a 2000 Toyota Echo?

Oxygen sensors typically last around 100,000 miles, but it is recommended to follow the manufacturer's maintenance schedule for specific replacement intervals.