Error code

OBD2 P2433

OBD2P2433
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Secondary Air Injection System Air Flow/Pressure Sensor Circuit High.

Severity

moderateCan drive, but monitor symptoms and address soon.

Summary

Code P2433 indicates that the secondary air injection system's air flow/pressure sensor circuit is reading higher than normal voltage (above 4.8 volts) for an extended period, typically on bank 1 of the engine.

Symptoms

  • Malfunction Indicator Light (MIL) illuminated
  • Possible reduced engine power
  • Potential noises from the A.I.R. pump

Common Causes

  • Plugged or restricted passage to the A.I.R. system pressure sensor
  • High resistance in connections to the A.I.R. system pressure sensor or BARO sensor
  • Failed A.I.R. system pressure sensor or BARO sensor
  • Failed Powertrain Control Module (PCM)

Diagnosis

  1. Check for technical service bulletins (TSBs) related to the issue.
  2. Inspect wiring and connectors for chafing, corrosion, or damage.
  3. Test sensor circuits using a fused jumper wire and scan tool.
  4. Verify that passages from the sensor to the exhaust are clear.

Fixes

  • Replace faulty A.I.R. system pressure sensor

FAQ

What should I do if my MIL is on and I have P2433?

Start by checking for TSBs, inspecting wiring and connectors, and testing the sensor circuits. If issues persist, replace the A.I.R. system pressure sensor.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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