What are the probable causes of DTC P0136?

P0136 - Oxygen O2 Sensor Circuit Low Voltage

Means that either your O2 sensor needs replacement, or the wires to it are going bad.

I would replace the engine thermostat and clear the codes and drive it for a few days. P0136 is engine does not reach operating temperature

It sounds like you have a plugged CAT, The Sulpher smell

Hi there:
Both generic codes refer at Oxygen Sensors, an HO2S that responds too slowly is most likely defective. In order to solve it just replace the HO2S; check there description and diagnosis:
- DTC P0136 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)
- DTC P0153 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 2)

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Is the wiring good going to the O2 sensors? Maybe just look the car over and see if you have any bad grounds. They can do weird things. Could be a bad ICU.

DTC P0136 - Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)
Essentially the same as P0137, a P0136 code refers to the second oxygen sensor on Bank 1. The O2 oxygen sensor produces a voltage between .1 mV and .9 mV. The ECM monitors O2 sensor voltage and determines if exhaust is lean or rich. O2 sensor voltage is high when exhaust is rich and low when exhaust is lean. The ECM monitors this voltage and increases or decreases fuel injector pulsewidth according to engine fuel/air ratio. If the ECM detects low HO2Sensor voltage for an extended period, it will set P0136 Conditions required to set: HO2 sensor voltage is low for longer than 2 minutes (minutes depend on model of vehicle. Could be up to 4 minutes)

There may be no visible symptoms to the driver. Poor fuel mileage, possible misfire, depending on O2 sensor position when sticking.

A code P0136 may mean that one or more of the following has happened:
Faulty O2 sensor leak in exhaust close to O2 sensor
Short to voltage on O2 signal circuit
Open in circuit resistance caused by corrosion in connector

If you need additional details, feel fr4ee to contact us clicking the previous faulf code links.

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A code P0136 may mean that one or more of the following has happened:

• Faulty O2 sensor or a leak in the exhaust close to O2 sensor
• Short to voltage on O2 signal circuit
• Open in circuit or high resistance caused by corrosion in the connector or other wiring to the O2 sensor.

The exhaust system should be inspected and the circuits to the sensor should be tested before spending any money on an O2 sensor. This COULD be caused by the sensor itself, but then again, maybe not.

faulty EGR will cause over fuelling, this will cause a fault in the oxygen sensor.

P0136?

Yes this can be caused by the gas cap lack or week rubber.

Rate this and replace the gas cap.

P0136 = O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

Which would be the oxygen sensor after the converter.