No check engine on with ignition on( no start)

Tiny
JESUSJ
  • MEMBER
  • 2003 CADILLAC CTS
  • 3.2L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 185,000 MILES
Doesn't show the check engine with the key on, and it wont start or crank, shows code Po650 and U2501
Wednesday, July 9th, 2014 AT 10:48 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
The 0650is a mil light malfunction and have a pro check this try resetting your anti theft for the no start. See pic
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Sunday, December 16th, 2018 AT 9:41 AM
Tiny
JESUSJ
  • MEMBER
  • 2 POSTS
I just reprogram the key, and got rid of the code P0650 but still have the U2105 loss comm With The Engine Control System - With Automatic Transmission
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Sunday, December 16th, 2018 AT 9:41 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That is a can problem and a pro should check this if he does he has to freeze frame it and record it prior to clearing the code. This can be a short to ground broken wire, short between ecm and tcm open circuit etc. Or shorted together. Definitely to be looked at by apro
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Sunday, December 16th, 2018 AT 9:41 AM

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