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)
- Vacuum pump
- EGR valve
- 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 |
General information
| Code: | 7.02256.23.0 |
| Brand: | PIERBURG |
| Title: | Pressure Converter, exhaust control |
| Car: | CITROEN |
| Weight : | 0,17 kg |
Criteria
| Valve type: | Solenoid Valve |
| Operating Mode: | Electric-pneumatic |
| Voltage [V]: | 12 V |
| For OE number: | 1628 HC |
Netto price:
$78.38
($78.38 without VAT 0%)
Your price:
-40%
$47.03
($47.03 without VAT 0%)
| Warehouse: | 1 pcs | |
| Supplier: | > 25 pcs |
General information
| Code: | 7.02256.24.0 |
| Brand: | PIERBURG |
| Title: | Pressure Converter, exhaust control |
| Car: | PEUGEOT |
| Weight : | 0,18 kg |
Criteria
| Valve type: | Solenoid Valve |
| Operating Mode: | Electric-pneumatic |
| Voltage [V]: | 12 V |
| For OE number: | 1628 LQ |
General information
| Code: | 7.02256.25.0 |
| Brand: | PIERBURG |
| Title: | Pressure Converter, exhaust control |
| Car: | FORD |
| Weight : | 0,18 kg |
Criteria
| Valve type: | Solenoid Valve |
| Operating Mode: | Electric-pneumatic |
| Voltage [V]: | 12 V |
General information
| Code: | 7.02256.26.0 |
| Brand: | PIERBURG |
| Title: | Pressure converter, turbocharger |
| Car: | OPEL |
| Weight : | 0,17 kg |
Criteria
| Valve type: | Solenoid Valve |
| Operating Mode: | Electric-pneumatic |
| Voltage [V]: | 12 V |
General information
| Code: | 7.02256.27.0 |
| Brand: | PIERBURG |
| Title: | Pressure Converter, exhaust control |
| Car: | BMW |
| Weight : | 0,18 kg |
Criteria
| Valve type: | Solenoid Valve |
| Operating Mode: | Electric-pneumatic |
| Voltage [V]: | 12 V |