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My car is chevy impala ls 3.82002 ,she have code 420,102,128

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Use Google
Type----OBD PO420
Then OBD PO102 etc
Add your vehicle if you need more info
The 420 is a failed exhaust converter
Better find out why & fix that before replacing it

Posted on Jul 17, 2013

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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SOURCE: Chevy impala diagnostic code PO742

i have the same problem, what can i do to fix it?

Posted on Jan 18, 2009

motor1258
  • 6674 Answers

SOURCE: blower motor will not turn off when car is off.

If it's only working on high setting it is usually the blower resistor that needs replacing. They are usually located under dash, passenger side, remove cover, and it should be bolted or screwed near blower motor itself. $10-$20 part

Posted on Mar 01, 2009

Zeevert
  • 373 Answers

SOURCE: 2000 chevy impala LS, between 40-60 tachometer

I'm surprised that the Check Engine Light didn't go on.
It could be a dirty or bad MAF sensor.
My 2002 Impala with 3800 would buck and surge under moderate acceleration at about 40-50mph.
I ended up replacing mine. It's located inbetween the air filter and the throttle body. Any auto parts store will sell you a can of MAF cleaner.

Posted on Oct 31, 2009

  • 137 Answers

SOURCE: my 2000 chevy impala shakes while driving.i let

It sounds like you might need to replace your motor mounts, or get a tier allignement done. The allignment you cannot do yourself but the motor mounts you can this requires you to place a jack under you engine and undoing the motor mounts then replace them and take away jack.

Posted on Jan 30, 2010

  • 1 Answer

SOURCE: 2003 chevy impala ls starts then stalls

I have replaced the radiator in my 2003 Chevrolet Impala LS. The car started running hot and shut down. Took it to a radiator shop and found a crack in the radiator. I have replaced 2 thermostats in the car already. I noticed water running from under my car today and it seems it was coming back out of the overflow. I am stumped as to what is going on with this car.

Posted on Jul 02, 2010

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Check the vacuum hoses for a leak.

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