Rocky-in-Connecticut

just today my TT is having no a start situation. With engine temp hot, the engine will crank but not start. I used Vag-Com and the ECM has stored a multitude of codes:

<i>13 Faults Found:

16502 - Engine Coolant Temp. Sensor (G62): Signal too High

P0118 - 35-10 - - - Intermittent

18010 - Power Supply Terminal 30: Voltage too Low

P1602 - 35-10 - - - Intermittent

17633 - Fuel Injector for Cylinder 1 (N30): Short to Ground

P1225 - 35-10 - - - Intermittent

17635 - Fuel Injector for Cylinder 3 (N32): Short to Ground

P1227 - 35-10 - - - Intermittent

17636 - Fuel Injector for Cylinder 4 (N33): Short to Ground

P1228 - 35-10 - - - Intermittent

17634 - Fuel Injector for Cylinder 2 (N31): Short to Ground

P1226 - 35-10 - - - Intermittent

17833 - EVAP Purge Valve (N80): Short to Ground

P1425 - 35-10 - - - Intermittent

17955 - Boost Pressure Regulation Valve (N75): Short to Ground

P1547 - 35-10 - - - Intermittent

17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2: Short to Ground

P1117 - 35-10 - - - Intermittent

17876 - EVAP Canister Solenoid Valve 2 (N115): Short to Ground

P1468 - 35-10 - - - Intermittent

17843 - Secondary Air Pump Relay (J299): Short to Ground

P1435 - 35-10 - - - Intermittent

17829 - Secondary Air Injection Solenoid Valve (N112): Short to Ground

P1421 - 35-10 - - - Intermittent

17697 - Boost Pressure Control Valve (N249): Short to Ground

P1289 - 35-10 - - - Intermittent

Readiness: 0000 0000</i>

I am thinking a fuel pump relay, but also a possible ignition switch. If I let the engine cool down it starts right up and seems to run normally. A CEL has not been thrown.

AxeYrCat

When you clear those, what codes come back?

Rocky-in-Connecticut

I am debating whether to let the dealer handle it under CPO warranty. The OEM fuel pump relay by itself is a $80 part. They might also replace the ignition switch, more $$$ money.

The CPO deductible is only $50.

So far I have not cleared the codes because I want the dealer to possibly see them.

TTapsale

fix that problem.It's a cheap item &amp; easy to DIY.I think I recall some other's here saying it could cause a lot of problems you would think are unrelated.Why not replace it &amp; clear the codes? Then go from there.I had a miss at high speed also which turned out to be coilpaks.