my 1999 Mazda Millenia s has a code of P 0170 and P 0173 can someone please help me out with the codes

Asked by Mar 31, 2013 at 11:23 PM about the 1999 Mazda Millenia 4 Dr S Supercharged Sedan

Question type: Maintenance & Repair

4 Answers

104,815

P0170 MAZDA - Bank 1 Adaptive Fuel Table At Calibrated Limit -- Possible causes: - Intake air leaks - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Lack of fuel - Faulty Mass Air Flow (MAF) sensor - Incorrect Positive Crankcase Ventilation (PCV) hose connection

104,815

P0173 MAZDA - Bank 2 Adaptive Fuel Table At Calibrated Limit - Possible causes: - Intake air leaks - Faulty front heated oxygen sensor - Ignition misfiring - Faulty fuel injectors - Exhaust gas leaks - Incorrect fuel pressure - Lack of fuel - Faulty Mass Air Flow (MAF) sensor - Incorrect Positive Crankcase Ventilation (PCV) hose connection

104,815

When is the code detected? - Fuel injection system does not operate properly. - The amount of mixture ratio compensation is not correct

104,815

P0173 MAZDA Description - With the Air/Fuel Mixture Ratio Self- Learning Control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the mixture ratio feedback signal from the heated oxygen sensors 1. The Engine Control Module (ECM) calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. In case the amount of the compensation value is extremely large (The actual mixture ratio is too lean.), the ECM judges the condition as the fuel injection system malfunction and light up the MIL (2 trip detection logic).

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