Em1 p0133 keeps appearing
Hysterically Calm
Joined: Jan 2013
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Re: Em1 p0133 keeps appearing
Low and behold, the connectors for the front and rear oxygen sensor are identical. The wiring is all bundled up on itself too. I was pulling electrical connectors for cleaning and die-electric grease when the light bulb went off. I had a wiring diagram close by and was able to figure it out almost instantly! A quit revision to which sensor was plugged into what bank of the ECM and the car ran better. I cleared the code, drove home and pulled the battery to re-set the fuel trims.
Re: Em1 p0133 keeps appearing
Check your exhaust for cracks, leaks, or damage. Check hood fuse 15 (7.5A). Use a voltmeter to make sure voltage is getting from fuse 15 to the O2 sensor.
Honda-Tech Member
Joined: Feb 2008
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Re: Em1 p0133 keeps appearing
Start off visually inspecting the entire exhaust system. Once you've done that, get the car up on jack stands, start it up, and feel for exhaust escaping from any of the gasket points.
If you loved me, you'd all sell me your magic cards to me today
Joined: Oct 2005
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From: Atlantic Ocean Florida
Re: Em1 p0133 keeps appearing
Do not actually touch the piping it gets hot, just hover your hand near it and feel for warm air.
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Trial User
Joined: Mar 2014
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Re: Em1 p0133 keeps appearing
IIRC, 99 EM1's had a TSB for an overly sensitive ECU. I ended up replacing my ECU to make mine STFU about the O2 sensor that I repeatedly replaced.
Try a few things first:
-replace your FPR with another known good one or a new one
-check for exhaust leaks
-clean your MAP sensor hole with throttle body cleaner and a paper clip. Be careful. Do the same for the snorkel on the MAP itself also.
Try a few things first:
-replace your FPR with another known good one or a new one
-check for exhaust leaks
-clean your MAP sensor hole with throttle body cleaner and a paper clip. Be careful. Do the same for the snorkel on the MAP itself also.
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