2002 Toyota Corolla diagnosis PO300

Tiny
DAVE1310
  • MEMBER
  • 2002 TOYOTA COROLLA
I am in the process of the diagnosis of a code PO300( random misfire)-I am using a scanner and the coolant temp sensor registers the same temp when cold as when warmed up fully- I just need a confirmation that the coolant sensor is not functioning causing a rough shaky idle when starting off in the am-after driving for 2-3 minutes in goes away and runs fine. My question is this the coolant sensor not functioning + possibly other issues?

Thanks in advance for info
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Thursday, April 2nd, 2015 AT 9:26 AM

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Tiny
JOHNNYT73
  • EXPERT
Yes, your coolant temp sensor is a very important input for your car. It doesnt just tell your guage what the temp is. The info also goes to your computer to help with air/fuel ratio also the transmission (if automatic) uses the info for shifting and so on.
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Thursday, April 2nd, 2015 AT 10:48 AM

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