1997 Geo Metro 1.0L MIL Lamp on
po420 cat eff. have 1.27v on scanner back probe pcm had 4.35v at yellow wire (02 sense) if pull terminal out of pcm volts comming from pcm. are there any flashes or what direction need to go? thanks for any help duane
FIX posted 10/22/2005
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Message Closed w/FIX
Vehicle Data1997 Geo Metro
Trouble Codes
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Message Closed w/FIX
Vehicle Data
1997 Geo Metro
VIN | 2C1MR2260V |
Engine | 1.0 L / 3 cyl / GAS |
Trans | 5-speed Standard |
Delivery | FI / tbi |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Occurs | Always |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |