Error code

OBD2 P0033

OBD2P0033
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Turbo Charger Bypass Valve Control Circuit.

Severity

moderateCan be driven, but performance issues and potential engine damage may occur.

Summary

Code P0033 indicates a malfunction in the turbocharger bypass valve control circuit, which is part of the engine's powertrain system and helps regulate boost pressure.

Symptoms

  • Engine light illuminated
  • Decreased engine performance due to insufficient or excessive boost pressure
  • Reduced fuel efficiency

Common Causes

  • Wiring chewed by a rodent
  • Failed boost control solenoid
  • Powertrain control module failure
  • Poor connection at boost solenoid connector
  • Moisture or corrosion in the boost solenoid connector

Diagnosis

  1. Test the boost valve by blowing air through it to check for blockages or stuck positions.
  2. Check wiring connections for moisture, corrosion, or poor connections.
  3. Perform a wiggle test on wires to identify shorts or breaks.
  4. Verify PCM functionality with voltage and ground tests.

Fixes

  • Replace the faulty boost control solenoid

FAQ

What does P0033 mean?

P0033 indicates a malfunction in the turbocharger bypass valve control circuit, which affects the regulation of boost pressure.

How do I diagnose P0033?

Diagnose by testing the solenoid and wiring for proper function and connections. Check for moisture or corrosion issues as well.

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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