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P2433 CHEVROLET

P2433 CHEVROLET - Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 1

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P2433 CHEVROLET Possible Causes

  • Faulty AIR Pressure Sensor
  • AIR Pressure Sensor harness is open or shorted
  • AIR Pressure Sensor circuit poor electrical connection

First diagnose P2433 CHEVROLET code

    Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.

Cost of diagnosing the P2433 CHEVROLET code

    Labor: 1.0

    The cost of diagnosing the P2433 CHEVROLET code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

When is the P2433 CHEVROLET code detected?

The PCM has detected a high voltage condition on the AIR Pressure Sensor signal circuit

P2433 CHEVROLET Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P2433 Chevrolet Description

The Secondary Air Injection (AIR) System aids in the reduction of hydrocarbon exhaust emissions during a cold start-up. This occurs when the start-up engine coolant temperature (ECT) is between 5-50°C (41-122°F), and the intake air temperature (IAT) is between 5-60°C (41-140°F). The AIR pump operates 5-60 seconds after start-up.

The Powertrain Control Module (PCM) activates the AIR system by simultaneously supplying grounds to the AIR pump and the AIR valve relays. This action closes the relays' internal contacts. The AIR pump and the AIR control solenoid valve/pressure sensor assembly are in turn energized, the pump runs and the control/shut-off valve opens.

The AIR pump sends pressurized fresh air into the pipes/hoses through the open control/shut-off valve, and into the exhaust manifold. The extra air accelerates the catalyst operation, helping it to reach operating temperature faster. The AIR pump remains ON for a short period of time after the control/shut-off valve is commanded OFF. When the AIR pump is commanded OFF it will not run or be activated until the next vehicle start. When the AIR system is inactive, the closed AIR control/shut-off valve prevents air/exhaust flow in either direction.

The AIR system pressure sensor is used to monitor pressure at the AIR control solenoid valve/pressure sensor assembly inlet during the commanded ON/OFF states.

OBDII Code P2433 Chevrolet - Secondary Air Injection System Air Flow/Pressure Sensor Circuit High Bank 1 - AutoCodes.com

P2433 CHEVROLET More Information

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