Honda Civic (2001 - 2005) Coupe / Sedan / Hybrid (Includes Acura EL)

Check Engine Light Help

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Old Mar 8, 2022 | 03:08 PM
  #1  
MrHatter's Avatar
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Default Check Engine Light Help

Hello,
I'm having trouble with my 2003 Honda Civic EX. I'm trying to fix the codes P0300-P03004 and P1259, and I've changed the spark plugs, ignition coils, fuel injectors, fuel pump, as well as oil and oil filter, but no use. I don't want to quickly take the car to the mechanic if the problem might be a small one. Can anyone help? I'm a bit new to this so it might take me a while to reply.
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Old Mar 9, 2022 | 05:50 AM
  #2  
NDNV's Avatar
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Joined: Feb 2009
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From: CANADA
Default Re: Check Engine Light Help

These engines prefer the OEM NGK spark plugs. What plugs did you put in?
P1259 (it looks for a certain PSI of oil pressure) can be caused by:
  • low engine oil
  • bad dirty engine oil
  • clogged screens in the VTEC solenoid valve causing low oil pressure
  • bad VTEC solenoid valve or short in the circuit
Do you have an oil leak or oil covered spark plugs?
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