P1421 Cadillac Cold Start Control
Possible causes
– Lack of intake air volume (block air filter)
– Fuel injection system (Clogged fuel injector or bad fuel pump)
– Faulty Engine Control Module (ECM)
– Fuel injection system (Clogged fuel injector or bad fuel pump)
– Faulty Engine Control Module (ECM)
What about the obd code?
The P1421 Cadillac code is detected when The Engine Control Module (ECM) does not control ignition timing and engine idle speed properly when engine is started with pre-warming up condition.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1421 Cadillac Description
The Engine Control Module (ECM) controls ignition timing and engine idle speed when engine is started with pre-warming up condition. This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
Cadillac Vehicle:Cadillac CTS Coupe, Cadillac CTS-V Coupe , Cadillac Eldorado , Cadillac Escalade EXT , Cadillac ATS , Cadillac CTS , Cadillac CTS Sedan , Cadillac CTS Sport Sedan , Cadillac CTS-V , Cadillac CTS-V Sedan , Cadillac Catera , Cadillac DTS , Cadillac DeVille , Cadillac STS-V , Cadillac STS , Cadillac Seville , Cadillac XTS , Cadillac XLR , Cadillac XLR Platinum , Cadillac Escalade , Cadillac SRX