P2436 Fault Code

Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/Performance Bank 2

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2436 fault code indicates an issue with the Secondary Air Injection System specifically related to the Air Flow/Pressure Sensor Circuit on Bank 2 of the engine. This system is designed to reduce emissions during cold starts by injecting air into the exhaust system. When the sensor circuit detects readings that fall outside the expected range or performance parameters, it triggers this fault code. It's crucial for optimizing vehicle emissions and ensuring compliance with environmental regulations.

What are the symptoms of the P2436 code?

When the P2436 code is present, a driver might notice:

• Illumination of the Check Engine Light (CEL).
• Possible decrease in engine performance or rough idling.
• Issues with cold starting or engine stalling.
• Increased emissions during inspection or testing.

What causes the P2436 code?

Several factors can contribute to the P2436 code, including:

• A faulty secondary air flow or pressure sensor.
• Wiring issues such as shorts, opens, or corrosion in the sensor circuit.
• Problems with the secondary air injection system including valve malfunctions or blockages.
• A failure in the engine control module (ECM) or issues with software calibration.

How to fix P2436?

To resolve the P2436 code, consider the following steps:

• Inspect and test the secondary air injection system, including the pressure/flow sensor and its wiring.
• Replace any damaged wiring or connectors that could be causing open or short circuits.
• If the sensor is faulty, replace it with a new one.
• Check the secondary air injection valves for proper operation and replace if necessary.
• Erase the fault code from the vehicle's computer and test drive to ensure the issue is resolved.