Sae P1XXX Diagnostic Trouble Codes

For additional monitor strategy information. Refer to the Bosch Motronic MED 9.1 OBD System Strategy document.

Fuel and Air ratios, control module

DTC	Error Message	Diagnostic Procedure	Malfunction Criteria and Threshold Value	Secondary Parameters with Enable Conditions	Monitoring Time Length	Frequency of checks, MIL Illumination
P1114	Internal resistance too large (Bank 1, sensor 2)	-- Refer to OXYGEN SENSOR BEHIND THREE WAY CATALYTIC CONVERTER G130, CHECKING .	Heater resistance, (128-648)*(8-40)1.02-25.9 k Ohm (dep. on mod. exhaust temp. and heater power)	Battery voltage, 10.7-16.1 V Modeled exhaust gas temp, 300-600 °C Engine shutoff time, 300 Sec. IAT, >6.75 °C	15 Seconds	2 DCY
P12A1	Fuel Rail Pressure Sensor Inappropriately Low	-- Refer to FUEL PRESSURE SENSOR G247, CHECKING .	Mixture controller <0.8 Output value rail pressure controller System deviation <-16.4-16.4 Mpa Mixture controller <0 Output value rail pressure controller System deviation >16.4 Mpa	--	5 Seconds 6550 Seconds	2 DCY
P12A2	Fuel Rail Pressure Sensor Inappropriately High	-- Refer to FUEL PRESSURE SENSOR G247, CHECKING .	Mixture controller <1.5 Output value rail pressure controller <-0.14 MPa System deviation <-16.4-16.4 Mpa Mixture controller <16 Output value rail pressure controller System deviation >16.4 Mpa	--	5 Seconds 6550 Seconds	2 DCY
P12A4	Fuel Rail Pump Control Valve Stuck Closed	-- Refer to LOW FUEL PRESSURE SENSOR G410, CHECKING .	Mixture controller 1.15-0.9 Output value rail pressure controller <-6 MPa System deviation<16.4	--	5 Seconds	2 DCY