SAE P1xxx-DTCs: Engine

DTC	Error Message	Diagnostic Procedure	Malfunction Criteria and Threshold Value	Secondary Parameters with Enable Conditions	Monitoring Time Length	Frequency of checks, MIL Illum
P1009	Air mass meter 1/2 implausible signal from load detection (Via throttle position and engine speed map)	Check Mass Air Flow (MAF) Sensor G70. Refer to → Mass Air Flow (MAF) Sensor G70 , checking .	Total mass air flow vs. lower threshold map 0-192.8 kg/h OR Total mass air flow vs. upper threshold map >114.4-168 kg/h	Time after engine start, 20 camshaft revs	2 Seconds	Continuous 2 DCY
P1009	Air mass meter 1/2 implausible signal from load detection (Via mass air flow model and lambda control)	Check Mass Air Flow (MAF) Sensor G70. Refer to → Mass Air Flow (MAF) Sensor G70 , checking .	Total mass air flow vs. calculated mass air flow >20 % AND Fuel system (mult) -15% OR Total mass air flow vs. calculated mass air flow -20% AND Fuel system (mult) >15%	Time after engine start, 20 camshaft revs Lambda control, Closed loop Engine load, >14.25% Throttle position, No fuel load ECT, >59.25°C Or Substitute ECT	2 Seconds	Continuous 2 DCY
P1500	Fuel Pump Relay	Check Fuel Pump Relay J17.	signal voltage 4.5...5.5 V signal voltage 3.0 V	Engine speed > 80 RPM	0.5 Sec	Continuous 2 DCY
P1502	Fuel Pump Relay	Check Fuel Pump Relay J17.	signal current 0.6....1.2 A	Engine speed > 80 RPM	0.5 Sec	Continuous 2 DCY