Intermittant failure to start

[MJCAUDI]

Hello all. I have a A4 B6 2002 1.8T 163BHP BFB Engine.
After the car has been standing for a week I tried to start , engine cranked but would not start. After few mins fired up ok. ( 110,000 miles on clock ).
Any tips would be apricaited before I decide to take to dealer

There are a few fault codes, I assume the Short to Ground
ones are secondary and caused by main fault.

I have ordered a new 02 sensor because of this one:

17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High
P1114 - 002 - Lower Limit Exceeded

could this be the problem?? would this prevent starting





Here is the VAG.COM report:

VAG-COM Version: Release 512.4-UD

Control Module Part Number: 8E0 909 518 AA
Component and/or Version: 1.8L R4/5VT G 0004
Software Coding: 0011501
Work Shop Code: WSC 12848

17843 - Secondary Air Pump Relay (J299): Short to Ground
P1435 - 002 - Lower Limit Exceeded - Intermittent
17938 - Camshaft Timing Adjustment: Short to Ground
P1530 - 002 - Lower Limit Exceeded - Intermittent
17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground
P1421 - 002 - Lower Limit Exceeded - Intermittent
17697 - Boost Pressure Control Valve (N249): Short to Ground
P1289 - 002 - Lower Limit Exceeded - Intermittent
17633 - Fuel Injector for Cylinder 1 (N30): Short to Ground
P1225 - 002 - Lower Limit Exceeded - Intermittent
17635 - Fuel Injector for Cylinder 3 (N32): Short to Ground
P1227 - 002 - Lower Limit Exceeded - Intermittent
17636 - Fuel Injector for Cylinder 4 (N33): Short to Ground
P1228 - 002 - Lower Limit Exceeded - Intermittent
17634 - Fuel Injector for Cylinder 2 (N31): Short to Ground
P1226 - 002 - Lower Limit Exceeded - Intermittent
17833 - EVAP Purge Valve (N80): Short to Ground
P1425 - 002 - Lower Limit Exceeded - Intermittent
17955 - Boost Pressure Regulation Valve (N75): Short to Ground
P1547 - 002 - Lower Limit Exceeded - Intermittent
17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2: Short to Ground
P1117 - 002 - Lower Limit Exceeded - Intermittent
17702 - Map Controlled Engine Cooling Thermostat (F265): Short to Ground
P1294 - 002 - Lower Limit Exceeded - Intermittent
17909 - Fuel Pump Relay (J17): Short to Ground
P1501 - 002 - Lower Limit Exceeded - Intermittent
17771 - Cylinder 3 Ignition Circuit: Short to Ground
P1363 - 002 - Lower Limit Exceeded - Intermittent
17774 - Cylinder 4 Ignition Circuit: Short to Ground
P1366 - 002 - Lower Limit Exceeded - Intermittent
17768 - Cylinder 2 Ignition Circuit: Short to Ground
P1360 - 002 - Lower Limit Exceeded - Intermittent
17765 - Cylinder 1 Ignition Circuit: Short to Ground
P1357 - 002 - Lower Limit Exceeded - Intermittent
17522 - Oxygen (Lambda) Sensor; B1 S2: Internal Resistance too High
P1114 - 002 - Lower Limit Exceeded

Many Thanks

Matthew

[Sebastian]

Replace the fuel pump relay!

[MJCAUDI]

ok will give it a try.

Thanks for tip

[MJCAUDI]

It seems the fuel relay was at fault. Opened the old one up and
contacts were pitted and black.
Thanks Sebastian