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1998 Ford Explorer XLT 5.0L MIL Lamp on
Posted to Ford Driveability on 6/15/2004 9 Replies

code p0420 and p0430 keep coming on for catalytic convertor efficiency below limit in banks 1 and 2. initially, the vehicle came in with a p0300 code for random misfire, and we changed plugs and wires and removed fuel injectors for service. then we started to ...

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car Vehicle Data

1998 Ford Explorer XLT

VIN 1FMZU35PWZ
Engine5.0 L / 8 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFI / MPFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
P0430Catalyst Efficiency Below Threshold (Bank 2)
Message Closed

car Vehicle Data

1998 Ford Explorer XLT

VIN 1FMZU35PWZ
Engine5.0 L / 8 cyl / GAS
Trans5-speed Automatic (Electronic)
DeliveryFI / MPFI
EmissionsOBD-II Compliant
SymptomsMIL Lamp On
OccursAlways

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
P0430Catalyst Efficiency Below Threshold (Bank 2)