Get your battery load tested in case of weak cells .If o.k and still going flat , check for a parasitic drain .Also check alternator output . This refers to code 1151 ,
(2005.06) - Signum 2003 To 2004 - Engine Type: Z22YH - High Pressure Pump, Fuel Pressure Regulator - Defective (P1191 set)
Signum/Vectra 2003 To 2005 - Engine Type: Z22YH
High Pressure Pump, Fuel Pressure Regulator - Defective (P1191 set)
The customer complains that the MIL is on. P1191 us set in the ECU.
1. High pressure pump defective, vehicle not driveable
2. Fuel pressure regulator defective, vehicle runs in emergency operating mode
This is caused by a defective high pressure pump or fuel pressure regulator valve. In case of customer complaint proceed as follows to verify the defective part:
1. Check fuel feed pressure at high-pressure pump with manometer (engine running)
Is primary feed pressure less than 3, 4 bar?
Yes: Low pressure fuel feed failure -> check fuse, relay, intank module.
2. Measure fuel pressure in the high pressure rail at idle by using Tech2 Datalist.
Is fuel pressure in the high pressure rail less than 600kPa?
Yes: High pressure pump defect, replace.
3. Pull off connector (two-core) of the fuel pressure regulator.
Measure the voltage of the fuel pressure sensor at 3000RPM (standing vehicle) with Tech2.
Is Voltage greater than 1, 2V?
Yes: Fuel pressure regulator defect, replace.
4. Defect is not clearly allocable to one component. Proceed according to TIS 2000 service instruction.
TIS Reference Number: E0001614
Posted Mar 14, 2013 (11 years ago)