Possible causes
– Faulty Oxygen sensor
– Ignition problem
– Fuel injection problem
– Engine mechanical condition
– Ignition problem
– Fuel injection problem
– Engine mechanical condition
Tech notes
There is a factory service bulletin for the following Cadillac models:
2000-2008 Cadillac Escalade
2000-2008 Cadillac Escalade EXT
2003-2008 Cadillac Escalade ESV
2000-2008 Cadillac Factory Service Bulletin OBDII Code P1174
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1174 CADILLAC Description
The Engine Control Module (ECM) performs a fuel trim cylinder balance utilizing the HO2S, when the calculated accumulated voltage exceeds a predetermined level this code is set
CADILLAC Technical Service Bulletins for P1174 code
2007 CADILLAC ESCALADE FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
2007 CADILLAC ESCALADE ESV 1500 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
2007 CADILLAC ESCALADE EXT 1500 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
2008 CADILLAC ESCALADE FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
2008 CADILLAC ESCALADE ESV 1500 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS
2008 CADILLAC ESCALADE EXT 1500 FUEL SYSTEM, GASOLINE:FUEL INJECTION SYSTEM:INJECTORS