Question about Saab 9
Posted by Anonymous on
P0420=catalyst system efficiency below threshold.p1334=poor combustion cylinders 3&4. Points to DI cassette.
Posted on Nov 03, 2015
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Posted on Jan 02, 2017
I looked up the codes you posted.
P0420 is showing a bad oxygen sensor on bank #1, the one down by the catalytic converter.
P0773 is an electrical problem with the shift solenoid E.
A bad oxygen sensor would cause lower fuel milage.
Posted on Mar 11, 2009
Both codes are for the oxygen sensors.
P0134 oxygen sensor on bank #1, sensor #1 is bad.
P0420 oxygen sensor on bank #1, the sensor down by the catalytic converter, is also bad.
Posted on Mar 26, 2009
SOURCE: P0420 and check engine light
A p0420 code is set when the computer determines that the catalytic converter isn't doing it's job. In almost all instances that code can't set as a result of a bad o2 sensor so they probably didn't have to be replaced. The catalytic converter will need to be replaced, prefferably by an oem part. This can be pretty expensive and should be considered before purchasing the vehicle.
I have replaced a few bad converters on late model subarus in the past few years.
Posted on Apr 18, 2009
SOURCE: Check Engine Light came on with code p0420. Dealer wants $3900 to fix "b2 manifold and front pipes. Does this make sense. Are their better alternatives. I left the dealership without fixing it and the
if your car no present any problem i think that mechanic is a thieft.
Sometimes the fuel have mixtures that make the check light on , to reset disconnect the negative battery few minutes, no go more to this mechanic,good luck
Posted on Apr 21, 2009
CODE PO420 CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD BANK I * CODE PO325 KNOCK SENSOR NO.1 CIRCUIT MALFUNCTION BANK NO.1 OR SINGLE SENSOR
Posted on Nov 14, 2009
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