AutoCodes – RAM – P0136 RAM

P0136 RAM 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 RAM 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 492

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 Dec 24, 2021

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0136 RAM 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 RAM - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2 - AutoCodes.com — P0136 RAM Code - Heated Oxygen Sensor Circuit Malfunction Bank 1 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0136 RAM?

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 RAM?

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 RAM 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 RAM Code

1. What are the common symptoms of OBDII code P0136?

The common symptoms of P0136 include decreased fuel efficiency, rough idling, engine hesitation, and an illuminated check engine light.

2. What does the OBDII code P0136 indicate?

OBDII code P0136 indicates a Heated Oxygen Sensor Circuit Malfunction for Bank 1 Sensor 2, specifically detecting an issue with the downstream oxygen sensor in bank 1 of the vehicle's exhaust system.

3. What are the potential causes of OBDII code P0136?

Potential causes of P0136 include a faulty oxygen sensor, damaged wiring or connectors in the oxygen sensor circuit, exhaust leaks, or issues with the vehicle's engine computer.

4. How can I diagnose the cause of OBDII code P0136?

To diagnose the cause of P0136, you can use an OBDII scanner to read the code and then inspect the oxygen sensor, wiring, and connectors for any visible damage. Additionally, conducting an exhaust system leak test can help identify potential issues.

5. Can I drive my vehicle with OBDII code P0136?

It is generally safe to drive your vehicle with code P0136, but it is recommended to address the issue promptly to prevent any further damage to the vehicle's engine or emissions system.

6. How can I repair OBDII code P0136?

The repair for P0136 typically involves replacing the affected oxygen sensor (Bank 1 Sensor 2) and repairing any damaged wiring or connectors in the oxygen sensor circuit.

7. Are there any tips to prevent OBDII code P0136 from recurring?

To prevent code P0136 from recurring, make sure to use high-quality oxygen sensors, perform regular maintenance on your vehicle, and address any exhaust leaks promptly.

8. Can a DIY enthusiast fix OBDII code P0136?

While some DIY enthusiasts may be able to replace the oxygen sensor and repair wiring themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair of OBDII code P0136.

9. How much does it cost to repair OBDII code P0136?

The cost to repair OBDII code P0136 can vary depending on the make and model of the vehicle, the labor rates in your area, and whether any additional parts or repairs are needed. In general, the cost can range from $100 to $300 for parts and labor.

10. Will resetting the check engine light resolve OBDII code P0136?

Resetting the check engine light may temporarily turn it off, but it will not resolve the underlying issue causing OBDII code P0136. It is important to diagnose and repair the problem to prevent the code from reappearing.