P0033

P0033 00

Charge Air Bypass Valve Control Circuit, Performance Problem







Fault symptom
CHECK ENGINE
Limp home

On-board diagnosis

Type of diagnosis:
Continuous

Enable criteria:
Battery voltage must be between 11 - 16 V.
NONE of the following DTCs must be detected: P0685, P0686, P0687
Engine running.
Engine speed less than 3500 rpm.
Output to solenoid valve is inactive.
Boost pressure should be more than current atmospheric pressure + 35kPa.
Intake pressure should be less than or equal to 35 kPa.
When the conditions are fulfilled, the values for boost pressure and air mass are stored for evaluation.

Fault criteria:
When the average value for boost pressure and air mass is above 1.1 kPa and 1.9 g/s, respectively.

Dependent:
None

System reaction to a fault:
Torque limited to max. 170 Nm.
Boost pressure adaption is blocked and reset.
Boost pressure control is blocked.
The system is pressure controlled.

OK report:
When the average value for boost pressure and air mass is below 0.6 kPa and 1.3 g/s, respectively.

Fault handling:
Type III
(See Description of On-Board Diagnostics/Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Functions in the diagnostic tool related to the fault:
Test value:
- Tachometer
- Absolute pressure sensor, charge air
- Manifold absolute pressure sensor
- Air Mass
- Atmospheric Pressure
- Charge Air Bypass Valve

Activation:
- Charge Air Bypass Valve