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Codes for misfire and water pump?

Tiny
BHAMDOC1973
  • MEMBER
  • 2012 LEXUS ES HYBRID
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 165,000 MILES
I deleted the codes to see if they come back, it had misfire on all cylinders but drives fine. Also, a code for water pump going faster than target, I scanned it and it shows this. No overheating. No misfiring. Also, there were codes for throttle pedal sensor.
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Wednesday, July 13th, 2022 AT 12:45 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
I would clear all codes because it says zero misfire count but shows a code, it could be a glitch in the system. Also, how is the coolant condition? It might be the cooling system needs a service that's why the rotational speed is too high. How does the engine seem to run? It could be the engine has a blown head gasket and it is pushing gases inside the cooling system allowing the water pump to turn too fast, this would account for the engine misfire as well. Let's do a chemical check to confirm the failure.

https://www.2carpros.com/articles/head-gasket-blown-test

Please run down this guide and report back.
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Wednesday, July 13th, 2022 AT 2:14 PM

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