code 43 eeeerrr

[tabletilter8]

car misses between 1 and 2 rpms changed fuel filter,plugs,wires,cap and rotor no change, last couple of days starting to miss all the time and it was dieing and restarting while driving or just dieing at idle then it wouldnt start at all. tested coil...good, tested igniter no good...replaced and its starting right up and hasnt died but still missing. tested ignition switch and main fuel relay both good. oh and it only misses when it warms up...mabie egr ports cloged up? it sets a code 43. help please

[coupes]

43 is o2 sensor...... replace that and go from there. But there's a good chance the o2 will fixyour issue.

[deevergote]

Why would you replace all of those things when Code 43 doesn't point to any of them? I mean, replacing wear items is never a bad idea... but thinking they were going to fix that problem is a bit odd.

As coupes said, 43 is usually the o2 sensor. The code is misleading, as it is for 'fuel supply system'... but the o2 sensor is the very beginning of the fuel supply system. It is the sensor that tells the ECU how much fuel to supply!

The engine misses when it warms up because the ECU switches from open loop mode (running on a pre-set fuel map only) to closed loop mode (running on o2 sensor feedback... in this case, inaccurate feedback.)

Replace the o2 sensor with Denso or NTK. Do not use a Bosch sensor, as they never work.

[esskater892]

i think there is a thread on here that tells all codes. but you didnt search and decided to post a new thread instead.

[wed3k]

yea im thinking of bumping the code 43 thread back up. OP spent all the money on things that werent needed and it only takes 5 minutes to test o2 signal with a multimeter. by the time a obd1 system shows a code 43, the o2 is usually deader than dead. obd2 systems are different.

[deevergote]

i think there is a thread on here that tells all codes. but you didnt search and decided to post a new thread instead.

And you did absolutely NOTHING to help by saying this.

Actually, as my post stated, code 43 is "fuel supply system". This guy obviously knew how to pull the codes, which means he very likely DID search. The meaning of the code is vague, and he replaced many of the things that people would assume are the cause of the error code. The only thing he is guilty of is not thinking "hey, does this code mean something different than what it says?"

If I see a reply like this from you again, you will be banned. Replies like this are useless, and equivalent to flaming in this section. If you can't offer useful information, don't waste your time (or mine) by posting.

[esskater892]

And you did absolutely NOTHING to help by saying this.

Actually, as my post stated, code 43 is "fuel supply system". This guy obviously knew how to pull the codes, which means he very likely DID search. The meaning of the code is vague, and he replaced many of the things that people would assume are the cause of the error code. The only thing he is guilty of is not thinking "hey, does this code mean something different than what it says?"

If I see a reply like this from you again, you will be banned. Replies like this are useless, and equivalent to flaming in this section. If you can't offer useful information, don't waste your time (or mine) by posting.

i was trying to say there was a thread that said o2. but yes i went back and looked, it said fuel supply. it was just an honest mistake, no need to threaten to ban me.

[deevergote]

If you're going to take the time to tell someone to search, you can take the time to search yourself and provide them with a link to that thread. That way, when someone ELSE searches, they will have twice the likelihood of finding the information they need, rather than a bunch of threads full of answers that say simply "search" (very often regarding a thread that doesn't actually answer the question, as was the case here.)


When you don't follow the rules of this forum, you get banned. So yes... you did not follow the rules of this forum, so the ban threat was warranted. Honestly, the rules state that you will actually BE banned, not just be threatened... so I gave you a bit of slack. I'll remember not to do that in the future.

[DIRTY DAVE]

Here is a list of OBD1 DTC codes and meanings:


Code 0 and 11 Electronic Control Module (ECM)
Code1 Heated oxygen sensor A
Code 2 Oxygen content B
Code 3 and 5 Manifold Absolute Pressure
Code 4 Crank position sensor
Code 6 Engine coolant temperature
Code 7 Throttle position sensor
Code 8 Top dead center sensor
Code 9 No.1 cylinder position sensor
Code 10 Intake air temperature sensor
Code 12 Exhaust recirculation system
Code 13 Barometric pressure sensor
Code 14 Idle air control valve or bad ECM
Code 15 Ignition output signal
Code 16 Fuel Injector
Code 17 Vehicle speed sensor
Code 19 A/T lock-up control solenoid
Code 20 Electric load detector
Code 21 V-TEC control solenoid
Code 22 V-TEC pressure solenoid
Code 23 Knock sensor
Code 30 A/T FI signal A
Code 30 A/T FI signal B
Code 41 Heated oxygen sensor heater
Code 43 Fuel supply system
Code 45 Fuel supply metering
Code 48 Heated oxygen sensor
Code 61 Front heated oxygen sensor
Code 63 Rear heated oxygen sensor
Code 65 Rear heated oxygen sensor heater
Code 67 Catalytic converter system
Code 70 Automatic transaxle
Code 71 Misfire detected cylinder 1
Code 72 Misfire detected cylinder 2
Code 73 Misfire detected cylinder 3
Code 74 Misfire detected cylinder 4
Code 75 Misfire detected cylinder 5
Code 76 Misfire detected cylinder 6
Code 80 Exhaust recirculation system
Code 86 Coolant temperature
Code 92 Evaporative emission control system

[deevergote]

The OP is aware of the codes, Dave. We have a "sticky" thread at the top of this section that includes them, as well as how to obtain them. The OP read that thread already.

[tabletilter8]

Why would you replace all of those things when Code 43 doesn't point to any of them? I mean, replacing wear items is never a bad idea... but thinking they were going to fix that problem is a bit odd.

As coupes said, 43 is usually the o2 sensor. The code is misleading, as it is for 'fuel supply system'... but the o2 sensor is the very beginning of the fuel supply system. It is the sensor that tells the ECU how much fuel to supply!

The engine misses when it warms up because the ECU switches from open loop mode (running on a pre-set fuel map only) to closed loop mode (running on o2 sensor feedback... in this case, inaccurate feedback.)

Replace the o2 sensor with Denso or NTK. Do not use a Bosch sensor, as they never work.

i didnt mention before when it first started missing it set the o2 code so i replaced it with a bosch wire up type.... as i see now, was a bad idea... but it didn't help although the code was gone. now months down the road it sets 43. oh and thanks for helping the newb out!

[tabletilter8]

yea im thinking of bumping the code 43 thread back up. OP spent all the money on things that werent needed and it only takes 5 minutes to test o2 signal with a multimeter. by the time a obd1 system shows a code 43, the o2 is usually deader than dead. obd2 systems are different.

whats an op? if you are refering to me i didnt spend any money i have a doner car that has all good parts on it that i swaped out. i have had these two cars running for the last 12 years never taken them to a machanic, i came on here to get help for a prob. i can't figure out not to get bashed by everyone!

[esskater892]

whats an op? if you are refering to me i didnt spend any money i have a doner car that has all good parts on it that i swaped out. i have had these two cars running for the last 12 years never taken them to a machanic, i came on here to get help for a prob. i can't figure out not to get bashed by everyone!

op is original poster