mexicansoljah81
Member
- :
- '13 Mazdaspeed3
had this checked out by a good friend and her bf, great people. They scanned my car, and multiple codes popped up. one was P0421 and other p0660. Now P0421 is "DEFINITION-CATALYST EFFICIENCY LOW-BANK 1. EXPLANATION-THE OXYGEN SENSORS MONITOR THE CATALYTIC CONVERTERS ABILITY TO STORE OXYGEN. PROBLEM CAUSES- 1. CATALYTIC CONVERTER DEFECTIVE (FAILURE POSSIBLY DUE TO #2,3, OR 4) 2. ENGINE MISFIRE OR RUNNING CONDITION. 3. LARGE VACCUM LEAK 4. ENGINE OIL LEAKAGE INTO EXHAUST-VALVE GUIDE SEALS, PISTON RINGS. THE PCM HAS DETERMINED THAT THE WARM UP CATALYST EFFICIENCY FOR BANK 1 IS BELOW TRESHOLD FOR THE CURRENT ENGINE OPERATING CONDITION. (BANK 1 IDENTIFIES THE LOCATION OF CYLINDER #1, WHILE BANK 2 IDENTIFIES THE CYLINDERS ON THE OPPOSITE BANK)." A few repairs have already been done due to at first had random misfires, so far new timing belt, spark plugs, wires, ignition coils, full tune up pretty much.
So question to all, have you had this code yet, how did you fix?
So far thinking of replacing OEM headers with aftermarket but not replacing pre-cat. So i will go from 2 catalytic's to 1. That will be the mid pipe one will stay. What do you think?
So question to all, have you had this code yet, how did you fix?
So far thinking of replacing OEM headers with aftermarket but not replacing pre-cat. So i will go from 2 catalytic's to 1. That will be the mid pipe one will stay. What do you think?