AutoCodes – Lincoln – P0136 Lincoln

P0136 Lincoln 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 Lincoln 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 1,731

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
Comments
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Code P0136 Lincoln 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 Lincoln - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 - AutoCodes.com — P0136 Lincoln Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0136 Lincoln?

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 Lincoln?

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 Lincoln 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 Lincoln Code

1. What does the OBDII code P0136 mean on a Lincoln?

P0136 indicates a malfunction in the heated oxygen sensor (HO2S) circuit for Bank 1 Sensor 2, which monitors the efficiency of the catalytic converter.

2. What are the symptoms of a P0136 code on a Lincoln vehicle?

Common symptoms include an illuminated check engine light, reduced fuel efficiency, rough idling, or mild engine performance issues.

3. What causes the P0136 code on a Lincoln?

Potential causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or issues with the vehicle's PCM (Powertrain Control Module).

4. How do I know which sensor is Bank 1 Sensor 2?

Bank 1 refers to the side of the engine with cylinder 1, and Sensor 2 is the oxygen sensor located after the catalytic converter.

5. Can a dirty catalytic converter trigger a P0136 code?

Yes, a clogged or inefficient catalytic converter can affect the performance of the downstream oxygen sensor, leading to this code.

6. How do you diagnose a P0136 code on a Lincoln?

Diagnosis includes using a scan tool to confirm the code, inspecting the oxygen sensor and its wiring, checking for exhaust leaks, and testing the sensor's voltage and resistance.

7. Can I drive my Lincoln with a P0136 code?

While the car may still be drivable, prolonged driving with this code can lead to increased emissions, reduced fuel economy, and potential damage to the catalytic converter.

8. How do you fix a P0136 code on a Lincoln?

Repairs may include replacing the oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or updating/reprogramming the PCM if necessary.

9. How much does it cost to fix a P0136 code on a Lincoln?

The cost varies but typically ranges from $150 to $300 for parts and labor, depending on whether the oxygen sensor or other components need replacement.

10. Can a failing oxygen sensor cause other problems if ignored?

Yes, a faulty oxygen sensor can lead to poor engine performance, increased fuel consumption, and potential damage to the catalytic converter over time.