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P2435 OBD-II Trouble Code: Secondary Air Injection System Air Flow/Press Sensor Circuit Bank 2

Check Engine Light

P2435 code definition

The P2433 diagnostic trouble code is an indication that there is a problem with the airflow/pressure sensor circuit on Bank 2 of the secondary air injection system.

Related Trouble Codes:

What the P2435 code means

The purpose of the secondary air injection system is to reduce the emission of harmful pollutants into the atmosphere. Fresh air is permitted into the exhaust system through the secondary air injection system and this reduces harmful pollutants that escape into the environment. The secondary air injection system collects information about pressure and flow. This information is sent to the powertrain control module (PCM) through a voltage signal. If the voltage signal reading does not fall within the specifications that have been predetermined by the manufacturer, the powertrain control module (PCM) will store the P2435 diagnostic trouble code and the Check Engine Light will come on.

What causes the P2435 code?

  • Faulty air injection valve
  • Faulty one-way check valve
  • Faulty air injection pump
  • Faulty pressure sensor
  • Pressure sensor wiring that is frayed, broken, or shorted
  • Pressure sensor connector that is damaged or corroded
  • Pressure sensor connector that has bent pins
  • Faulty vacuum switching valve
  • Vacuum switching valve wiring that is frayed, broken, or shorted
  • Vacuum switching connector that is damaged or corroded
  • Vacuum switching connector that has bent pins

What are the symptoms of the P2435 code?

  • Check Engine Light is on
  • Secondary air injection system may be noisy
  • Engine may stall when idling
  • Engine may stall when starting the vehicle
  • Engine may hesitate when accelerating
  • P2440 diagnostic trouble code stored in the Powertrain Control Module (PCM)

How does a mechanic diagnose the P2435 code?

  • Diagnostic trouble codes should be diagnosed in the order that they appear in the powertrain control module (PCM).

  • Use an OBD-II scanner to collect all trouble codes that have been stored by the powertrain control module (PCM) as well as freeze frame data.

  • Inspect vacuum switching valve wiring for frays, breaks, and shorts.

  • If any vacuum switching valve wiring has frays, breaks, and shorts, repair and replace as required.

  • Inspect vacuum switching valve connector for damage, corrosion, or bent pins.

  • If the vacuum switching valve connector is damaged, corroded, or has bent pin, repair and replace as required.

  • Clear all diagnostic trouble codes from the Powertrain Control Module (PCM) and operate the vehicle or complete a test drive to see if the P2435 trouble code comes back

  • Inspect pressure sensor wiring for frays, breaks, and shorts.

  • If any pressure sensor wiring has frays, breaks, and shorts, repair and replace as required.

  • Inspect pressure sensor connector for damage, bent pins, and corrosion.

  • If the pressure sensor connector is damaged, corroded, or has bent pin, repair and replace as required.

  • Clear all diagnostic trouble codes from the Powertrain Control Module (PCM) and operate the vehicle or complete a test drive to see if the P2435 trouble code comes back.

  • Inspect the one-way check valve to ensure it is working properly.

  • If one-way check valves are faulty, repair and replace as required.

  • Clear all diagnostic trouble codes from the Powertrain Control Module (PCM) and operate the vehicle or complete a test drive to see if the P2435 trouble code comes back.

  • Clear all diagnostic trouble codes from the Powertrain Control Module (PCM) and operate the vehicle or complete a test drive to see if the P2435 trouble code comes back.

  • Inspect the air injection pump to ensure it is working properly.

  • Inspect the air injection pump hoses for breaks and loose connections.

  • If there are breaks and/or loose connection in the air injection pump hoses, repair or replace as required.

  • Inspect the air injection system fuses.

  • If there is damaged wiring or pumps that are causing a blown fuse, repair or replace as required.

Common mistakes when diagnosing the P2435 code

One common mistake when diagnosing the P2435 trouble code is neglecting to add a drain tube when replacing the secondary air injection pump. If it is necessary to replace the secondary air injection pump, it is important to add a drain tube to the pump housing. Failing to add a drain tube to the secondary air injection pump housing could cause multiple failures. It is also important to test the one-way check valves before completing a diagnosis as faulty one-way check valves are commonly associated with the P2435 diagnostic trouble code.

How serious is the P2435 code?

A diagnostic trouble code is normally considered serious when it causes driveability issues or a change in performance. Symptoms of the P2435 diagnostic trouble code could make driving conditions very hazardous. For this reason, the P2435 diagnostic trouble code is considered serious and should be diagnosed and repaired as soon as possible.

What repairs can fix the P2435 code?

  • Replace faulty air injection valve
  • Replace faulty one-way check valve
  • Replace faulty air injection pump
  • Replace faulty pressure sensor
  • Repair or replace frayed, broken, or shorted pressure sensor wiring
  • Repair or replace damaged or corroded pressure sensor connector
  • Repair or replace bent pins in the vacuum switching connector
  • Replace faulty switching valve
  • Repair or replace frayed, broken, or shorted vacuum switching connector
  • Repair or replace melted, or corroded vacuum switching connector
  • Repair or replace bent pins in the vacuum switching connector

Additional comments for consideration regarding the P2435 code

When diagnosing the P2435 trouble code, it is important to test the one-way check valves prior to making a diagnosis. Faulty one-way check valves are common, and in order to make a proper diagnoses, this component should be addressed. Failing to diagnose and replace one-way check valves that are faulty could result in damage to other secondary air injection system components.

Need help with a P2435 code?

YourMechanic offers certified mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
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