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2000 Cadillac Deville DTS
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Discussion Starter #1
Im just wondering... my car has trouble codes c1252 c1253 u1000 p0300 p1652 u1056 b0249... i know my car wont pass smog with the p0300 missfire code... but will they fail me for having the other codes? im not sure if they fail me for certain codes.. or if u cant have any codes when smogging.
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
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19,286 Posts
Im just wondering... my car has trouble codes c1252 c1253 u1000 p0300 p1652 u1056 b0249... i know my car wont pass smog with the p0300 missfire code... but will they fail me for having the other codes? im not sure if they fail me for certain codes.. or if u cant have any codes when smogging.
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codes are meaningless without their definitions -
and while we might recognize some of them -
no one has them all memorized -

the SES light only illuminates when there is an emissions-related fault

depending on your state - if the SES light is ON -
they won't begin the test - you are automatically FAILED -
 

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2000 Cadillac Deville DTS
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23 Posts
Discussion Starter #3
oh ok..... no SES light is on.. the p0300 is a missfire code... the other codes have to do with powertrain output circuit and normal force circuit
 

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Master of the Dark Art of Diagnostics
2003 DHS - two-2002 DHS, 2003 SLS, 1995 Sedan DeVille, 1989 Coupe DeVille
Joined
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19,286 Posts
oh ok..... no SES light is on.. the p0300 is a missfire code... the other codes have to do with powertrain output circuit and normal force circuit
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generally speaking - any emissions-related code will cause you to fail -
the P0300 code would be considered an emissions related code -
 

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2000 Cadillac Deville DTS
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23 Posts
Discussion Starter #6
so... c1252 LF Normal Force Malfunction c1253 RF Normal Force Malfunction u1000 Class 2 Communication Malfunction
B0249 Heater/Defrost/AC Door Range Error p0300 Engine Misfire Detected P1652 Powertrain Induced Chassis Pitch Output Circuit U1056 Loss of Communications with RSS

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i know there are codes that show what cylinder is missfiring..... but this one is just saying missfire... where should i start since it doesnt specifywhat cylinder
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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26,323 Posts
Are all these codes current?

The onboard reader does not specify which cylinder is misfiring. You'll need an external reader for that.

How many miles?

Have the plugs been changed?

When was the TB last cleaned?
 

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Registered
2000 Cadillac Deville DTS
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23 Posts
Discussion Starter #8
these codes all say current.. there are some history codes as well ... i didnt list them

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153,000 miles, i dont know. i just got the car.. ill have to check the condition of plugs.... whats the normal procedure to clean the TB
 

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2001 Seville STS, 1990 Seville (RIP), 1972 Sedan Deville
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Pretty much every other brand that members here have tried, have ended up fouled.

If you mentioned Bosch specifically, because of their +2/+3/+4 designs, they're a gimmick anyway.
 
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