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2005 Mercury Sable GS 3.0L Poor Idle Quality, Hesitation, Surge, MIL Lamp on
Posted to Ford Driveability on 11/10/2013 9 Replies

Vehicle originally came in for a misfire. Typical dead miss felt with code po301 cylinder 1 misfire. Plug was wet. Misfire and code went away with replacement of coil wires and plug.

Catalytic converter efficiency codes remains. Removed converters to check fo...

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car Vehicle Data

2005 Mercury Sable GS

VIN 1MEFM50U95
Engine3.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Surge, MIL Lamp On
OccursAlways, Idle

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)
Message Closed

car Vehicle Data

2005 Mercury Sable GS

VIN 1MEFM50U95
Engine3.0 L / 6 cyl / GAS
Trans4-speed Automatic (Electronic)
DeliveryFuel Injection
EmissionsOBD-II Compliant
SymptomsPoor Idle Quality, Hesitation, Surge, MIL Lamp On
OccursAlways, Idle

Trouble Codes

P0420Catalyst Efficiency Below Threshold (Bank 1)