Re: P1259 CEL on after engine swap. 2000 Accord LX


Recently I had to swap out my USDM engine for a JDM one after one of the cylinders gave out on my old engine. The swap went fine but there is a problem with the VTEC after the swap. The VTEC does not kick in at all and there is a loss of power.
I reset the CEL light but it comes on as soon as you turn on the car. I think the VTEC is suppose to kick in at 4000 RPMs if I'm not mistaken. I checked the connections and the solenoid and everything seems fine but the oil pressure switch (the green one) was missing from the JDM engine, there was only a bolt plugging the hole. So I took the OPS from the old engine but it was banged up and the prongs were misaligned. I'm still getting the same CEL as soon as I turn the key.
Would it be wise to buy an OPS from autozone, the aftermarket ones and try that? or any other ideas..possibly the solenoid itself is bad?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

P1259 means the oil pressure is low in the VTEC circuit. If the switch is missing or "banged up", the ECM will be fooled into thinking the pressure is low and will refuse to activate the VTEC.
Do you mean the MIL illuminates as soon as the key is turned to "II", or does it come on _after_ the engine starts?
--
Tegger

The Unofficial Honda/Acura FAQ
  Click to see the full signature.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.