AutoCodes – Ford – P0136 2001 Ford F150

P0136 2001 Ford F150 Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

Quick Answer

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the three-way catalyst (manifold), monitors the oxygen level in the exhaust gas on each bank. Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1, Heated Oxygen Sensor 2 Bank 1 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: P0136 2001 Ford F150 indicates Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2.
Common causes: Common causes include Exhaust gas leaks, Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1, Heated Oxygen Sensor 2 Bank 1 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 8,999

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 Jul 24, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
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Code P0136 2001 Ford F150 Description

The Heated Oxygen Sensor 2 (HO2S2) (Downstream), after the 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 maintain near the ideal stoichiometric ratio. The HO2S2 output voltage changes suddenly in the vicinity of the stoichiometric ratio. The Powertrain Control Module (PCM) adjusts the fuel injection time so that the air-fuel ratio is nearly stoichiometric. The HO2S2 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 PCM interprets Lean when the HO2S2 voltage is below 0.45 V. If the oxygen in the exhaust gas decreases, the air-fuel ratio becomes Rich. The PCM interprets Rich when the HO2S2 voltage is above 0.45 V. The P0136 code will set when the PCM detects that the HO2S2 signal voltage is out of range for an extended period.

OBDII Code P0136 2001 Ford F150 - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 - AutoCodes.com — P0136 2001 Ford F150 Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0136 2001 Ford F150?

Exhaust gas leaks
Faulty Heated Oxygen Sensor 2 (HO2S2) (Downstream) Bank 1
Heated Oxygen Sensor 2 Bank 1 harness is open or shorted
Heated Oxygen Sensor 2 Bank 1 circuit poor electrical connection
Inappropriate fuel pressure
Faulty fuel injectors

How to Fix the DTC P0136 2001 Ford F150?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0136 2001 Ford F150 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 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P0136 on a 2001 Ford F150?

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

2. What does the OBDII code P0136 indicate on a 2001 Ford F150?

- This code indicates a Heated Oxygen Sensor Circuit Malfunction for Bank 1 Sensor 2 in the exhaust system.

3. What are the possible causes of the P0136 code on a 2001 Ford F150?

- Potential causes include a faulty oxygen sensor, wiring issues, exhaust leaks, or a damaged catalytic converter.

4. How can I diagnose the P0136 code on my 2001 Ford F150?

- Diagnose the code by checking the oxygen sensor's wiring, inspecting for exhaust leaks, and testing the sensor's voltage output.

5. Can I drive my 2001 Ford F150 with the P0136 code?

- It is not recommended to drive the vehicle with the P0136 code as it can lead to decreased fuel efficiency and potential engine damage.

6. How do I repair the Heated Oxygen Sensor Circuit Malfunction on Bank 1 Sensor 2 in my 2001 Ford F150?

- The repair typically involves replacing the faulty oxygen sensor and ensuring all wiring connections are secure.

7. Are there any tips for preventing the recurrence of the P0136 code on a 2001 Ford F150?

- Regularly inspecting and maintaining the oxygen sensors, as well as addressing any engine performance issues promptly, can help prevent the code from reappearing.

8. Can a DIY enthusiast fix the P0136 code on a 2001 Ford F150?

- Depending on your skill level and access to tools, a DIY enthusiast can replace the oxygen sensor and check for wiring issues to address the P0136 code.

9. How much does it typically cost to repair the P0136 code on a 2001 Ford F150?

- The cost of repairing the P0136 code can vary depending on the labor rates and parts prices, but it generally ranges from $150 to $400.

10. Will resetting the check engine light resolve the P0136 code on a 2001 Ford F150?

- Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the Heated Oxygen Sensor Circuit Malfunction.