Possible causes
– Faulty front heated oxygen sensor
– Ignition misfiring
– Faulty fuel injectors
– Exhaust gas leaks
– Incorrect fuel pressure
– Faulty Mass Air Flow (MAF) sensor
– Ignition misfiring
– Faulty fuel injectors
– Exhaust gas leaks
– Incorrect fuel pressure
– Faulty Mass Air Flow (MAF) sensor
Tech description
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 P0172
When is the obd code mean?
– Fuel injection system does not operate properly.
– The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)
– The amount of mixture ratio compensation is too large. (The mixture ratio is too rich.)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– Excessive Fuel Consumption
– Excessive Fuel Consumption
P0172 CADILLAC OBD Code Description