P1259 code???
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Bought a 2001 civc ex manual a couple of months ago. Had engine light on. Just getting around to checking it out. Got codes p1259 & p0420. Car cuts out at 4000 rpm. Replaced vtec solenoid with refurbished ebay solenoid. No change. Started electrical troubleshooting the solenoid. Clicks when I manually apply 12v. Installed test light on ecu solenoid trigger wire. Lights up around 2800 rpm. Ecu only stay lit for 2-3 sec even if rpm is maintained at 2800. Don't know if suppose to stay engaged or cut out. I also noticed that ecu solenoid wire doesn't energize all the time around 28k rpm in every gear. Sometimes in only 3rd & 4th. Sometimes in all gears. I also think im getting p0420 code after engine sputter at 4000 rpm. This may be caused by p1259. I also have erratic high idles around 1500-2000 rpm. Seems like when I'm driving and get off the gas. The rpm drops to 1500-2000rpm then holds for 2-3 sec then drops to normal. Puzzled..Thanks in advance for any help.
Last edited by Kiddta; 09-27-2016 at 05:43 AM. Reason: Misspelling
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