Hello,
i've test a lot of thing, and always this f*** error code 1
i've change the lambda and it was same thing
i've change fuel filter and then fuel pump
look at injector and spark...
see the timming belt
but always the code 1!!!
what is wrong?
i've read this http://wikitest.pgmfi.org/twiki/bin/...y/OxygenSensor
and i understand the o2 sensor is on / off position?
please help

 

code 1 is faulty ecu get another ecu and see what happens

 

code 1 is O2 sensor not the ecu

 

Code 1 is for O2 sensor. Follow all appropriate troubleshooting outlined in Chapter 11 of the Helm's manual.

 

i don't've the honda scan tool
i've make a lot of test today...
replace fuel pressure regulator, change the lambda (civic one), and many small replace (map sensor air temperature sensor)
same ****!
when i disconnect the lambada i've code 41
but all the time i've the ****ing code 1
i'll test continuity soon... if anybody 've a idea...

lambada are different beetween civic and prelude lambda? where i can buy a lambda for my lude (same as the origin) without the price of Honda sales

 

What are you referring to when you say lambda?

 

lambda sensor = O2 sensor

 

yes thanks

 

www.sparkplugs.com or www.ebay.com.

However, your O2 sensor wiring (not the plug) might be bad, or possibly your ECU.

 

thanks
wiring look good, i'll go with a p28 and eCtune soon but i don't understand, i'll look at voltage on Lambda quickly

 

the o2 sensor is specific on honda prelude? or a O2 from a civic VTI is okay?

 

What engine is in your Prelude? What is the current ECU part number? What year is the Civic VTi, and which engine does it have? VTi trim can have either a SOHC VTEC or a DOHC VTEC engine depending on the model year and country.

Most OBD-1 primary oxygen sensors are the same, but not all of them.

 

i've an H22a8 obd2 from a euro 5G in a 4G
i've test my old 4g lambda, a OBX prelude o2 sensor (for prelude vti) actualy i've one 02 from an D16z6 sohc vtec...
the ref in my oem lambda are
OHC 501-h3
NTK : Japan
8G31
it's a 4 wire obd2
thanks to help me

 

Are you running the OBD-2 ECU?

 

yes!

 

i got the same problem on my obd1 95 gsr, i tried another ecu and same thing, im using a chipped p28 with o2 disabled and still get code 1, i unplugged o2 sensor and same thing