94 Civic CX/D15B8/P05 ECU - Code 41
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94 Civic CX/D15B8/P05 ECU - Code 41
I replaced the ECU about 1 1/2 years ago with a p05 ecu. I have the d15b8 engine and its giving me this code. is there a resolution?
Last edited by Former User; Dec 17, 2014 at 06:24 AM.
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From: Big Sky Country, United States of America
Re: Code 41 on a 1994 Civic CX
Not all CX's use a one wire O2 sensor. CA and federal emissions models are different. CA emissions models use a 4 wire (heated) O2 sensor, while federal (49 state) models use a one wire sensor.
If your ECU p/n is 37820-P05-L00, 37820-P05-L01, or 37820-P05-L02 then you have a CA emissions ECU that requires a 4 wire O2 sensor.
If your ECU p/n is 37820-P05-L00, 37820-P05-L01, or 37820-P05-L02 then you have a CA emissions ECU that requires a 4 wire O2 sensor.
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Re: 94 Civic CX/D15B8/P05 ECU - Code 41
Post a picture of the label on your ECU and a video of the CEL blinking the code.
The P05 does not look for the O2 sensor heater element (code 41) because there isn't one.
EDIT: I was unaware that some D15B8 engines have a 4-wire sensor. Thanks.
OP - Ohm test the O2 sensor and test for voltage and ground on the two heater element wires.
The P05 does not look for the O2 sensor heater element (code 41) because there isn't one.
EDIT: I was unaware that some D15B8 engines have a 4-wire sensor. Thanks.
OP - Ohm test the O2 sensor and test for voltage and ground on the two heater element wires.
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