Return Of "the Cel"
02-Mar-2005, 12:07 PM
#1
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Posts: 593
Return Of "the Cel"
okay all you crazy honda fanatics, genius, smart, mechnically inclined people...
1996 honda civic Si
i need help on the following errors
41 Primary oxygen sensor heater
:- P0135 Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1) Heater Circuit Malfunction
65 Secondary oxygen sensor heater
:-P0141 Secondary Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) Heater Circuit Malfunction
what is my issue and how can i fix it.
thanks
Russ
russeld@sympatico.ca
1996 honda civic Si
i need help on the following errors
41 Primary oxygen sensor heater
:- P0135 Primary Heated Oxygen Sensor (Primary HO2S) (Sensor 1) Heater Circuit Malfunction
65 Secondary oxygen sensor heater
:-P0141 Secondary Heated Oxygen Sensor (Secondary HO2S) (Sensor 2) Heater Circuit Malfunction
what is my issue and how can i fix it.
thanks
Russ
russeld@sympatico.ca
02-Mar-2005, 12:22 PM
#3
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Join Date: Jun 2003
Posts: 593
well my primary was changed like 2 years ago when i first got the CEL..but the problem stayed....i used after market $120 BOSCH O@ sensor for front. since problem stayed i decided not to change the secondary boz the car ran fine.
car has 147km's on it 1996 honda civic Si
Gas mileage i haven't checked but it did seem like it dropped but i'm not 100% sure.
thanks for your help
car has 147km's on it 1996 honda civic Si
Gas mileage i haven't checked but it did seem like it dropped but i'm not 100% sure.
thanks for your help
02-Mar-2005, 01:31 PM
#9
yeah, the heater control circuit is inside the ECU. I'd have to say wiring as well, but what are the odds of BOTH wires getting fuct??
what was done to the car to cause the CELs to come on in the first place?
what was done to the car to cause the CELs to come on in the first place?
02-Mar-2005, 01:36 PM
#14
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Join Date: May 2003
Posts: 3,745
Originally posted by bbarbulo
yeah, the heater control circuit is inside the ECU. I'd have to say wiring as well, but what are the odds of BOTH wires getting fuct??
what was done to the car to cause the CELs to come on in the first place?
yeah, the heater control circuit is inside the ECU. I'd have to say wiring as well, but what are the odds of BOTH wires getting fuct??
what was done to the car to cause the CELs to come on in the first place?
As for what wiring, id start by inspecting the wires on the O2 sensors, i cant really remember what colour the heater circuit is but i believe is the grey and black. Correct me if im wrong
02-Mar-2005, 01:39 PM
#15
who cares what color wires they are... it's as simple as opening even the most basic of shop manuals and looking for the heater control circuit diagram. why would we fill our heads with useless knowledge? my o2 wires are green, white, black, and brown.
02-Mar-2005, 01:40 PM
#16
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Join Date: May 2003
Posts: 3,745
Originally posted by meateater
the wires that come out from the oxygen sensors are as follows
2 white
1 black
1 purple
the wires that come out from the oxygen sensors are as follows
2 white
1 black
1 purple
haha guess im a little late, naw those arent OEM colours. OEM is 2 white, Black, and Green. The replacement O2 sensors i got were from NTK and had OEM colours and OEM plugs. The person who wired it prolly wired the heater circuit wrong
02-Mar-2005, 01:41 PM
#17
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Posts: 593
Originally posted by bbarbulo
and ur car runs fine cuz the O2s still heat up in the exhaust stream and still function, except the engine take longer to enter closed loop.
and ur car runs fine cuz the O2s still heat up in the exhaust stream and still function, except the engine take longer to enter closed loop.
02-Mar-2005, 01:44 PM
#18
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Join Date: Jun 2003
Posts: 593
Originally posted by kwikb16a2
haha guess im a little late, naw those arent OEM colours. OEM is 2 white, Black, and Green. The replacement O2 sensors i got were from NTK and had OEM colours and OEM plugs. The person who wired it prolly wired the heater circuit wrong
haha guess im a little late, naw those arent OEM colours. OEM is 2 white, Black, and Green. The replacement O2 sensors i got were from NTK and had OEM colours and OEM plugs. The person who wired it prolly wired the heater circuit wrong
how do i test test if everything is workign fine BUT the problem.
why does color matter.? thanks
Russ
02-Mar-2005, 01:46 PM
#19
that's when the O2s come online (heat up) and start giving readings.... then the ECU rather than looking at MAP TPS IACV and CTS begins to look at the rest of the sensors for input... like the O2 sensors. This completes the feedback loop and the ECU fuels from tables at first, then according to O2 feedback it begins to trim injector pulsewidth to optimize the air/fuel ratios. With heated O2s it takes like 2 minutes, with non-heated ones it could take like... 10 minutes or something. not a BIG deal, but helps emissions just after startup.
