'00-'05 VW Golf/Jetta MK4 is Hard to Start - Multiple DTCs!

Symptoms: Your VW Golf/Jetta MK4 is suddenly hard to start. The engine runs rough. The check engine light does not shut off. A scan tool finds 8 DTCs:

17633 - Cyl.1-Fuel Inj. Circ. Short to Ground
17634 - Cyl.2-Fuel Inj. Circ. Short to Ground
17635 - Cyl.3-Fuel Inj. Circ. Short to Ground
17636 - Cyl.4-Fuel Inj. Circ. Short to Ground
17859 - Sec.Air Inj.Sys.Circ. Short to Ground
17829 - Sec.Air Inj.Valve Circ Short to Ground
17833 - Tank Vent.Valve Short to Ground
17880 - EVAP Emission Contr.LDP Circ Short to Ground

What's causing this? Can we fix it? Let's find out...

Other episodes in this playlist:
VW Golf/Jetta MK4 Hood Lock Repair Secrets (Jul 20, 2015)
VW Golf/Jetta MK4 Hatchback Lid/Trunk Lid Repair Secrets (Oct 19, 2015)
VW Golf/Jetta MK4 Airbag MIL with DTC 01217 Repair Secrets (Apr 29, 2016)
VW Golf/Jetta MK4 Glove Box Handle Repair (May 1, 2019)
VW Golf/Jetta MK4 Trunk Lock Repair Secrets (May 9, 2021)
VW Golf/Jetta MK4 Wipers Won't Shut Off (Dec 31, 2021)
VW Golf/Jetta MK4 Moon Roof Won't Close (July 22, 2022)
VW Golf/Jetta MK4 Shifter LEDs Won't Stay ON (Dec 22, 2022)
VW Golf/Jetta MK4 Driver's Side Tail Light Replacement (Jun 15, 2023)
VW Golf/Jetta MK4 Hard to Start - Multiple DTCs! (February 20, 2024)
VW Golf/Jetta MK4 Intermittent Check Oil MIL (March 30, 2024)
VW Golf/Jetta MK4 Wet Driver's Carpet (April 20, 2024)
VW Golf/Jetta MK4 Cabin Air Filter Service (May 4, 2024)
Hope you enjoy them. Thanks for watching!

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