TOYOTA P CODES (POWERTRAIN) P0100 - P0199

I'm Having A Heck Of A Time Finding Out If This Is Upstream Or Downstream, And Where I've Had Several Parts Stores Give Me Opposite...

I Got This Code While On The Highway With The Cruise Control Set At 60 Mph. The Temperature Gauge Is Staying At Where It Should Be And I Am...

Changed Pre-cat O2 Sensor And Same Codes Come Back Even After Clearing Computer. Cleaned Maf, Replaced Fuel Pump, And Used Fuel Injector...

What Items Do I Need To Check And How Do I Repair Them?

Car Hesitates Until I Have To Floor It To Take Off.

Code P0172 Fuel Too Rich Blank 1, I Have Change Oxizen Censor, Plugs Still The Code Is There Can Pls Help. Thx

I Check My Check Engine Light The Codes That Came Up Where Po135 And Po155 I Don't Know Where These Sensors Are And What Sensors To Buy.

I Know What Po135 Is But What Is Po135pd?

I Cleared The P0135, And It Seems Like It Takes Around 45 Minutes To Come Back. No Other Codes Or Symptoms.

The Check Engine Light In Our Vehicle Listed Above Has Been Off And On Intermittently For The Last Several Weeks. Ran Out And Grabbed An...