Code 43 Fuel supply system
Honda-Tech Member
Joined: Oct 2002
Posts: 5,152
Likes: 24
From: chicago burbs, Il, USA
90% of the time that code is caused by your O2 starting to go bad.
ECU sees either too much fuel or too little, tries to adjust, O2 doesn't respond correctly, ECU sets this CEL.
But since the ECU still sees an O2 signal it doesn't set the O2 CEL.
ECU sees either too much fuel or too little, tries to adjust, O2 doesn't respond correctly, ECU sets this CEL.
But since the ECU still sees an O2 signal it doesn't set the O2 CEL.
Thread Starter
Honda-Tech Member
Joined: Jan 2007
Posts: 852
Likes: 0
From: coeur d alene, id, us
Re: (Relic1)
i tried two diff o2 sonsors. one off an obd2 gsr motor and the other was a stock one for my car, didnt change anything,... im thinking maybe my fuel pump is going bad but if it were going bad it shouldnt run... after startup idle it fluctuates
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