Simple causes are often overlooked

This article is based on service information SI 0096 Pierburg


Vacuum system:

  • Vacuum pump.
  • EGR valve.
  • Secondary air valve.
  • Electro-pneumatic valve.

Potential complaints:

  • Engine misfires in part load.
  • Sawing engine.
  • Limp home function.
  • Decreasing braking power.
  • Lack of performance in full load.

During troubleshooting, we can often rely on the OBD fault code memory and overlook simple causes. One possible cause of the fault can be found in the vacuum system of the vehicle. Vacuum is used as auxiliary energy in many
vehicles.

Each component in the vacuum system may have a leak where vacuum is escaping. Pay particular attention to the following: 

  • Faulty hoses (porous, marten bites, leaking connections). 
  • Electro-pneumatic valves (e.g. boost pressure control valve).
  • Leaking non-return valves/vacuum reservoir.
  • Defective/porous diaphragms or seals on pneumatic actuators.

The following malfunctions can also point to faults in the vacuum generation:

  • Components of the exhaust gas recirculation and in the secondary air system fail. Because these are pollutantrelevant faults monitored by the on-board diagnostics, the vehicle can enter limp home function (with petrol engines).
  • The braking power reduces markedly during multiple braking in quick succession (downhill driving).
  • Turbocharger control and diesel throttle are not working. This can lead to the complaints "sawing engine" or "engine misfires".
  • Some comfort devices will fail partly or completely.

Reduced performance due to failed length or flap adjustment in the intake manifold. In the event of damage, check all components in the vacuum system for leaks and replace the damaged part. 

Full list of pressure transducers by Pierburg


Example BMW 118d (E87): Components in the vacuum system (green), vacuum hoses (red)
Components in the vacuum system

  1. Vacuum pump
  2. EGR valve
  3. Electropneumatic pressure transducer

Table - electromagnetic pressure transducers Pierburg:

Vehicles PIERBURG Nr.: Ref. Nr.:
CITROËN
C5 2.2 HDi, C8 2.0/2.2 HDi, Jumper 2.0/2.2 HDi, Jumpy 1.9 D, Xantia 2.0 HDi, Xsara 1.9 D/2.0 HDi
PEUGEOT
Boxer 2.0/2.2 HDi, Expert 1.9 D, 307 2.0 HDi, 406 2.0/2.2 HDi, 607 2.0/2.2 HDI, 807 2.0/2.2 HDi
FIAT
Ducato 2.0 JTD
7.02256.23.0 1628 HC, 1628 LR, 9628971180, 9618971180
CITROËN
Berlingo 1.9 D/2.0 HDi, C15 1.9 D, C3 1.4 HDi, C4 2.0 HDi, C5 2.0/2.2 HDi, C8 2.0/2.2 HDi, Evasion 2.0 HDi, Jumper 2.0/2.2 HDi, Jumpy 1.9 D/2.0 Hdi, Xantia 2.0 HDi, Xsara 1.9 D/2.0 HDi, Xsara Picasso 2.0 HDi
PEUGEOT
Boxer 2.0/2.2 HDi, Expert 1.9 D/2.0 HDi, Partner 1.9 D/2.0 HDi, 206 2.0 HDi, 306 1.9 D/2.0 HDi, 307 2.0 HDi, 406 2.0/2.2 HDi, 607 2.0/2.2 HDi, 806 2.0 HDi, 807 2.0/2.2 HDi
FIAT
Ulysse 2.0/2.2 JTD, Ducato 2.0/2.2 JTD, Scudo 1.9 D/2.0 JTD LANCIA Phedra 2.0/2.2 JTD, Zeta 2.0 JTD
7.02256.24.0 1628 LQ, 9635704380
FORD
Ranger 2.5/3.0 TDCi, Everest 2.5/3.0 TD, Endeavour 2.5/3.0 TDCi
MAZDA
BT-50 2.5/3.0 CDVi
7.02256.25.0 6M34-9J459-BA, 1448857, WE01-13-726
OPEL
Signum 2.2 DTI, Vectra C 2.2 DTI
VAUXHALL
Signum 2.2 DTI, Vectra C 2.2 DTI
7.02256.26.0 58 51 045, 93174808
BMW
123d E87, 335d E90, 535d E60, 535 GT F07, 635d E63, 740d F01, X1 23d E84, X3 30d E83, X5 30sd, 35d, 40d E70, X6 35d, 40d E71
7.02256.27.0 11 65 8 509 323, 11 65 7 811 814, 11 65 7 808 032, 11 65 7 796 338

Selection of items

General information

Code:
7.02256.23.0
Brand:
PIERBURG
Name:
Pressure Transducer, adjusting element (throttle)
Vehicle:
CITROEN

Price

Netto price:

$66.40

($66.40 excl. VAT 0%)

Your price: (-35%)

$43.16

($43.16 excl. VAT 0%)

Stock: 4 pcs
We recommend! 

CITROEN
7.02256.23.0, Pressure Transducer, adjusting element (throttle), Switch valve, PIERBURG, 1628HC, 1628LR, 9618971180, 9628971180, 1628.HC, 1628.LR

General information

Code:
7.02256.24.0
Brand:
PIERBURG
Name:
Pressure Transducer, adjusting element (throttle)
Vehicle:
PEUGEOT

Price

Netto price:

$52.40

($52.40 excl. VAT 0%)

Your price: (-35%)

$34.06

($34.06 excl. VAT 0%)

Stock: > 25 pcs
We recommend! 

PEUGEOT
7.02256.24.0, Pressure Transducer, adjusting element (throttle), Switch valve, PIERBURG, 1628LQ, 9635704380, 1628.LQ

General information

Code:
7.02256.25.0
Brand:
PIERBURG
Name:
Pressure converter, turbocharger
Vehicle:
FORD

Price

Netto price:

$132.91

($132.91 excl. VAT 0%)

Your price: (-35%)

$86.39

($86.39 excl. VAT 0%)

Stock: 0 pcs
External stock: Check
We recommend! 

FORD
7.02256.25.0, Pressure converter, turbocharger, Switch valve, PIERBURG, WE01-13-726, 1448857, 6M34-9J459-BA

General information

Code:
7.02256.26.0
Brand:
PIERBURG
Name:
Pressure converter, turbocharger
Vehicle:
OPEL

Price

Netto price:

$191.28

($191.28 excl. VAT 0%)

Your price: (-35%)

$124.33

($124.33 excl. VAT 0%)

Stock: 0 pcs
External stock: Check

OPEL
7.02256.26.0, Pressure converter, turbocharger, Switch valve, PIERBURG, 5851045, 93174808

General information

Code:
7.02256.27.0
Brand:
PIERBURG
Name:
Pressure converter, turbocharger
Vehicle:
BMW

Price

Netto price:

$94.24

($94.24 excl. VAT 0%)

Your price: (-35%)

$61.26

($61.26 excl. VAT 0%)

Stock: 1 pcs
We recommend! 

BMW
7.02256.27.0, Pressure converter, turbocharger, Switch valve, PIERBURG, 11657808032, 11657811814, 11658509323, 11747796338, 139311, 2509311, 7796338, 7808032, 7811814, 8509323
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