SOURCE: 1998 honda accord obd code P0171 and P0170.
Hi,welcome to fix ya.
p0171 is for a lean fuel condition .A variety of things can cause this code the most common one is a bad o2 sensor but a plugged injector,fuel filter or dirty egr system can cause this as well.
SOURCE: I have a 1998 Honda Accord the service engine soon
p1259 is a problem with the VTEC system. this system is for improved performance at higher rpm's. oil can get sludged up and clog the system, or the VTEC solenoid can just go bad. you can always have someone with a scan tool clear the codes to turn off the light, but until the problem is fixed, it will just keep coming back on
SOURCE: have a 1991 honda accord.
You need to replace the vehicle speed sensor located on the trasmission.
SOURCE: have a 91 honda accord. experiencing dramtic
Sounds like your O2 sensor is malfunctioning. When the check engine light comes on, the computer goes into a preset mode bypassing the O2 sensor and that's why it suddenly runs good. Have the O2 sensor checked. You can also have the trouble codes read and they should point you in the same direction.
Testimonial: "Thanks, this will be the next thing I check. I have done alot of the work myself then took it to someone else, this was never mentioned as a possiblit"
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