P0421 and Hesitation at low RPMs
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P0421 and Hesitation at low RPMs
Need help to figure out what to change first!
14000K miles.Sporadic hesitation/miss at low RPM (about 2000 RPM-more noticablewhen cold).
Trouble code indicates O2 sensors and/or catalytic converter. All are original.
Here is the data from the reader that lit the MIL:
DTC for which Freeze Frame was StoredP0421
Fuel System 1 StatusClosed Loop
Fuel System 2 StatusClosed Loop
Calculated LOAD Value38.82 %
Engine Coolant Temp195.80 °F
Short Term Fuel Trim - Bank 1-4.69 %
Long Term Fuel Trim - Bank 13.91 %
Short Term Fuel Trim - Bank 22.34 %
Long Term Fuel Trim - Bank 23.91 %
Engine RPM1866 rpm
Vehicle Speed Sensor38.53 mph
14000K miles.Sporadic hesitation/miss at low RPM (about 2000 RPM-more noticablewhen cold).
Trouble code indicates O2 sensors and/or catalytic converter. All are original.
Here is the data from the reader that lit the MIL:
DTC for which Freeze Frame was StoredP0421
Fuel System 1 StatusClosed Loop
Fuel System 2 StatusClosed Loop
Calculated LOAD Value38.82 %
Engine Coolant Temp195.80 °F
Short Term Fuel Trim - Bank 1-4.69 %
Long Term Fuel Trim - Bank 13.91 %
Short Term Fuel Trim - Bank 22.34 %
Long Term Fuel Trim - Bank 23.91 %
Engine RPM1866 rpm
Vehicle Speed Sensor38.53 mph
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blackbolt22
Mazda Protege
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Nov 7, 2012 11:03 AM
