Low engine power output / little movement on the turbo pressure gauge and rattling from the turbocharger.
Symptom: Low engine power output / little movement on the turbo pressure gauge Rattling from turbocharger CHECK ENGINE lamp on Diagnostic trouble code P1105
Low engine power output / little movement on the turbo pressure gauge and rattling from the turbocharger. |
Fault symptoms
Low engine power output / little movement on the turbo pressure gaugeRattling from turbocharger
CHECK ENGINE lamp on
Diagnostic trouble code P1105
Conditions
On certain cars, the clip holding the turbocharger pushrod to the arm on the wastegate valve can come loose. If the clip does come loose, the pushrod can slide off the pin on the wastegate valve arm. As a result, boost pressure control will not function and the valve disc will cause a rattling noise from the turbocharger.Diagnostic help
Additional help for fault diagnosisChecking the wiring
The standardised text below can be used here if necessary:Jiggle the wiring harness at several points and in different directions to reveal intermittent breaks and short-circuits in the wiring harness. Observe the multimeter, test lamp or diagnostic instrument while doing this.
Diagnostic procedure
1. |
Undo the hose clip on the charge air pipe and the screw on the bypass pipe. Move aside the bypass pipe.
|
2. |
Remove the heat shield.
|
4. |
If the throttle arm does not return to its original position using the method above, unplug the oxygen sensor connector and remove the primary catalytic converter or disconnect the front exhaust pipe from the turbocharger. Otherwise, only perform steps 8, 10 and 11.
|
5. |
Press the tip of a screwdriver against the top right part of the throttle disc while pressing in the throttle spindle and raising the throttle arm by hand.
|
6. |
Press the tip of a screwdriver against the throttle disc while pressing in the throttle spindle and turning the throttle arm further to pass the edge of the exhaust turbine.
|
7. |
If it is difficult to pass this edge, carefully file down the edge that hinders the throttle disc with a round file. Check that the throttle disc is not damaged.
|
8. |
Connect the arm to the pushrod and secure it with the new clip specified above.
|
9. |
Fit the primary catalytic converter and plug in the oxygen sensor or fit the front exhaust pipe. Grease the studs with
30 20 971 Screw thread paste
.
Tightening torque 24 Nm (18 lbf ft) |
10. |
Fit the heat shield.
|
11. |
Fit the bypass pipe using a new O-ring.
|