1 wire to 4 wire o2
11-19-2007, 11:15 PM
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1 wire to 4 wire o2
Ok to start off I did the 1 wire to 4 wire o2 conversion... Now Im getting code 41 still? I dont know what I did wrong, but these were my instructions. Did I do it right? My car is a CX and I swaped in a Y8 and im running stock p28 ECU, but when I plug inn the stock po5 ecu no codes, but the p28 code 41?
If you bought a CX or DX civic with a 1-wire o2 sensor, you're going to have to convert to a 4-wire to run a b-seires ecu, and most of the "top of the line" d-series ecu's like the p28.
First things first, you need to physically buy a 4-wire o2 sensor. you can't send a heater signal to a device which has no heater circuitry and expect it to work
Wires on 4 wire O2:
WHITE: Signal Wire
GREEN: Signal Ground
2 BLACK: Both black wires are the heater circuit wires.
Using a P28 ECU (and should work for most obd1 ecu's with 4-wire controls)
Run O2 Sensor signal (white) To D14
Run O2 Sensor signal Ground (green) to D22 (or any good Ground)
Run O2 Sensor Heater Circuit Control (black) to A6
Run the other black heater circuit power wire to (A25) or any good switched +12VDC source.
(you may mix up the black wires... if car dies after it is warm/10-30 seconds, that's the first thing to swap over and troubleshoot.. theres no way to tell one from the other by looking at them)__________________
If you bought a CX or DX civic with a 1-wire o2 sensor, you're going to have to convert to a 4-wire to run a b-seires ecu, and most of the "top of the line" d-series ecu's like the p28.
First things first, you need to physically buy a 4-wire o2 sensor. you can't send a heater signal to a device which has no heater circuitry and expect it to work
Wires on 4 wire O2:
WHITE: Signal Wire
GREEN: Signal Ground
2 BLACK: Both black wires are the heater circuit wires.
Using a P28 ECU (and should work for most obd1 ecu's with 4-wire controls)
Run O2 Sensor signal (white) To D14
Run O2 Sensor signal Ground (green) to D22 (or any good Ground)
Run O2 Sensor Heater Circuit Control (black) to A6
Run the other black heater circuit power wire to (A25) or any good switched +12VDC source.
(you may mix up the black wires... if car dies after it is warm/10-30 seconds, that's the first thing to swap over and troubleshoot.. theres no way to tell one from the other by looking at them)__________________
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sh!ft
Honda CRX / EF Civic (1988 - 1991)
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09-14-2010 11:56 AM
