P0034

P0034 00

Charge Air Bypass Valve Circuit. Open / Short to Ground







Fault symptom

On-board diagnosis

Type of diagnosis:
- CHECK ENGINE
- Limp home
- Continuous

Enable criteria:
- Battery voltage must be between 11 - 16 V.
- Engine running.
- Output to solenoid valve is inactive.

Fault criteria:
- When voltage on the output is below 2.0 V for more than 1 s.

Dependent:
- None

System reaction to a fault:
- Torque limited to max. 170Nm.
- Boost pressure adaption is blocked and reset.
- Boost pressure control is blocked.
- The system continues to function with a calculated air mass instead of the value from the mass air flow sensor.

OK report:
- When fault criteria NOT fulfilled for 2 s.

Fault handling:
Type III
(See section 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

Diagnosis regards:
- Electrical fault in connecting leads or component.

Functions in the diagnostic tool related to the fault:

Test value:
- Charge Air Bypass Valve

Activation:
- Charge Air Bypass Valve
(See also description of readings/activations in diagnostic tool)