P0436 Code - Catalyst Temperature Sensor Range/Performance Bank 2 Sensor 1

What Does P0436 Mean?

OBD-II Code P0436 is defined as a Catalyst Temperature Sensor Circuit Range/Performance
The Catalytic Converter uses multiple temperature sensors to ensure that the Catalytic Converter is working properly and does not overheat. When the engine control module (PCM) determines there is an incorrect signal from the Catalytic Converter Temperature Sensor, the PCM will set code P0436.

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What are the common causes of P0436 ?

The most common cause of the P0436 code a faulty catalytic converter. Other causes may include:

• Faulty temperature sensor
• Bad oxygen sensor
• Open or shorted temperature sensor harness
• Poor electrical connection within the temperature sensor circuit

However, these causes are rare. Under the umbrella of “faulty catalytic converter”, there are several underlying causes that could be ultimately to blame. These include:

• Using the incorrect fuel
• Contaminated oil
• Faulty spark timing
• Leaking exhaust manifold
• Faulty coolant temperature sensor
• Faulty fuel injection component
• Leaking down pipe
• Leaking flex hose
• Faulty mass air flow sensor
• Faulty manifold air pressure sensor
• Faulty pressure regulator

How do you troubleshoot P0436 ?

While fuel economy was increased, acceleration was seriously compromised, and the loss of engine vacuum led to a dangerous loss of braking assist when the P0436 code system was in four-cylinder mode. In addition to these issues, while the company proposed a hydraulically controlled system that could be switched from within the car, the version they implemented had to be manually changed in the engine compartment using hand tools.

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