The voltage signal must be constant for oxygen sensors to work properly. Low voltage can negatively impact the sensor. P0136 indicates that a sensor behind the catalytic convertor is experiencing voltage issues. The load is spread across the other O2 sensors when one is disabled.
The Engine Control Module/ECU continuously monitors the voltage values for the O2 sensors. The ECM will set the fault code P0136 if the voltage values do not meet the programmed specifications. In addition, the engine warning lamp will illuminate to alert the driver if the voltage levels are outside the specified range.
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What are the symptoms of fault code P0136?
The engine fault light may illuminate when the P0136 code is present. However, this does not necessarily mean that there are any problems with performance. The following symptoms can occur in some cases:
- Engine fault lamp illuminates
- Engine misfiring, loss of power
- Exhaust leaks
- Fuel consumption increases
What are the causes of fault code P0136?
The fault can be caused by several factors, which vary according to the model and make of the car. It is therefore a good idea that you check the service bulletins issued by the manufacturer. There may not be a service bulletin for a variety of reasons.
- Catalytic Converter Fault
- Exhaust leak
- Faulty oxygen sensors
- Corrosion or damage to the connector
- Short circuit in the Signal Circuit
- Leakage in the intake air
How to Fix Fault Code P0136?
Check the voltage of the circuit system first. The sensor may be the cause of the fault if the voltage is normal. If the sensor is dirty or faulty, it may not work properly. It can be cleaned or replaced. You must inspect the entire circuit if there is a voltage problem.
Replace any component that appears suspect. Check the heater circuit as well.
Check for leaks if the O2 sensor or circuit is in good condition. If you can’t find any leaks in the exhaust, inspect the catalytic convertor for damage or corrosion.
How Important is Fault Code P0136?
This type of fault has a moderate level of importance. If you don’t fix the problem as quickly as possible, your engine could suffer more damage. The O2 sensor is essential to maintaining engine performance. They monitor the air/fuel ratio and send signals to the ECU in order to maintain this ratio at optimal levels. The other sensors will compensate for a malfunctioning sensor, but it is only a short-term solution. The air-fuel ratio will eventually be affected, resulting in increased fuel consumption. This can lead to serious engine problems and malfunctions.
