Sae P3XXX Diagnostic Trouble Codes

For additional monitor strategy information.

Fuel and air mixture, additional emissions regulations

DTC	Error Message	Diagnostic Procedure	Malfunction Criteria and Threshold Value	Secondary Parameters with Enable Conditions	Monitoring Time Length	Frequency of checks, MIL, Illumination
P3081	Engine temperature too Low	-- Allow engine to warm up. Coolant temperature must be at least 50 °C.	Measured ECT not within range of the reference model, > 10.5 K	Max. reference temp, ECT < 60° C	Continuous	2 DCY
P3047	Activation starter relay 2 Short circuit to B+	-- Check the Engine Coolant Temperature (ECT) Sensor -G62-. Refer to ENGINE COOLANT TEMPERATURE SENSOR G62, CHECKING .	Measured time, 0 sec Measured time, 1 sec	ECT at start, 10-40° C Engine speed sensor line "KL50R"	1 Sec	Once every DCY
P3048	Activation starter relay 2 Short circuit to Ground (GND)	-- Check the Engine Coolant Temperature (ECT) Sensor -G62-. Refer to ENGINE COOLANT TEMPERATURE SENSOR G62, CHECKING .	Measured time, 0.18 sec	ECT at start, 10-40° C	1 Sec	Once every DCY
P3049	Activation starter relay 2 Open circuit	-- Check the Engine Coolant Temperature (ECT) Sensor -G62-. Refer to ENGINE COOLANT TEMPERATURE SENSOR G62, CHECKING .	Measured time engine cranking, >1 sec	ECT at start, 10-40° C Engine speed (starter active)	1 Sec	Once every DCY
P3209	Emissions bank 3 Sensor 1 Signal too slow	-- Check oxygen sensors -- before catalytic converter HEATED OXYGEN SENSOR, CHECKING .	O2S signal front vs. modeled O2S signal ratio < 0.35 AND cycles completed, > 12 (SULEV) > 25 (ULEVII)	Lambda control, closed loop Engine load, 15 - 60% Engine speed, 1, 400 - 3, 520 RPM Delta engine load, < 4%/seg. Evap purge flow, < 15 (-) Actual Lambda 0.95 - 1.05 (-)	200 Sec	Multiple 2 DCY