Cadillac Owners Forum banner

2003 CTS will not start after cleaning engine

3032 Views 11 Replies 7 Participants Last post by  CTSUK
Help Needed

My 2003 Cadilac CTS with over 235k miles will not start after cleaning engine with engine cleaner and rinsing with hose to remove some oil from valve cover gasket leak. After cleaning I started car successfully and ran for about 20 minutes. The next day - nothing, all lights and panel come on but engine does nothing. Checked codes and came up with:

P0850 Park/Neutral Switch Input Circ
P0616 Starter Relay Circ Lo
P0128- Coolant Temp below Thermostat

After reading the forum I tried putting the car in Netural - same response
I have currently disconnected the battery

I'm sure my brillant cleaning effort was not a wise course of action, lesson learned.

Any guidance appreciated...
1 - 1 of 12 Posts
I agree with CTSUK, unplug all the connections that got exposed to water and spray either WD-40 or some wire dryer in the connections, it should help displace any moisture.
I have had this problem before with other cars when using water under the hood. Brake parts or Carburetor cleaner works real well for getting rid of grime and oil and dries instanlty without having to use water.
1 - 1 of 12 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.