Error P0136 – how to fix?

Hello!,good afternoon. In this article you will see a description of fuses and relays Error P0136 – how to fix?

Include with photos of block diagrams and their locations. Highlighted the cigarette lighter fuse (as the most famous thing people look for).
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Code definition P0136

O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

What does the code P0136 mean?

P0136 is a general OBD-II code indicating that the bank 1 O2 sensor is not within the minimum and maximum voltage calibrated limits for the ECM.

What causes the code P0136?

  • The ECM monitors the O2 sensor high and low voltages. This code appears when the voltage limits do not fall within the specifications programmed into the ECM.
  • The ECM detects a voltage problem and turns on the Check Engine light.
  • The ECM uses other O2 sensors to try to control fuel injection with known values.
  • There is a leak in the exhaust system or a damaged catalyst in front of the sensor.

What are the symptoms of the P0136 code?

  • The engine can run with an excessively rich composition if it goes into open circuit.
  • If the spark plugs become dirty over time, the engine may stop working.
  • The Check Engine light will come on.
  • You may have exhaust gas leaks or loss of power due to a clogged or damaged catalytic converter.

How does the mechanic diagnose the P0136 code?

  • Scan the codes and document the data from the frozen frame, then erase the codes to verify the fault.
  • Monitor the O2 sensor data to see if the voltage is changing between low and high at a rapid rate compared to other sensors.
  • Check the O2 sensor wiring and harness connections for corrosion.
  • Check the O2 sensor heating circuit for proper resistance as per specification.
  • Check for exhaust gas leaks upstream of the sensor.
  • For further diagnostics, spot tests recommended by the manufacturer should be performed.

The most common errors when diagnosing the P0136 code

Follow these simple tips to avoid misdiagnosis:

  • Repair any leak in the exhaust system upstream of the sensor to avoid incorrect readings.
  • Check the O2 sensor for contamination by oil or coolant from engine leaks.
  • Repair damaged harnesses properly, taking no shortcuts to avoid repeated failures.
  • Check that the removed O2 sensor is not damaged by a faulty catalytic converter and replace the catalytic converter if it is faulty.

How serious is the P0136 code?

  • The O2 sensor output voltage can indicate problems with the engine and exhaust system that are causing the O2 sensors to provide erratic output voltages.
  • The O2 sensor may not read properly if the catalytic converter is damaged in front of the sensor.
  • The ECM can remain in open loop until the O2 system is repaired or the O2 sensor starts working again, causing abundant long-term conditions that could possibly damage other engine components.

What repairs can fix the code P0136?

  1. Replace O2 sensor in bank 1 sensor 2.
  2. Repair or replace wiring or connection to O2 sensor for bank 1 of sensor 2
  3. Repair the exhaust leaks or the damaged catalytic converter

Additional notes regarding code P0136

The bank 1 sensor 2 O2 sensor circuit is used to provide voltage feedback to the ECM for fuel control and catalyst performance information.

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