Code P0118, P0418 and P0420. How to fix it?

Tiny
MOA4819
  • MEMBER
  • 1999 CHEVROLET BLAZER
  • 215 MILES
Car is starting and running well but when stop at the light the idle look like something is wrong.
Saturday, January 7th, 2012 AT 12:54 AM

1 Reply

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
P0118-ECT sensor circuit high voltage-Engine coolant temperature sensor voltage is too high.
P0418-Not found
P0420-TWC System-low efficiency bank 1. Three way catalyst. Could be a problem with the O2 sensor or the catalytic converter. Or driver side plugs not firing properly.
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Saturday, January 7th, 2012 AT 4:11 AM

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