Honda Civic GX 2004 Owner's Manual

The 2004 Honda Civic GX is designed to run on compressed natural gas (CNG) instead of gasoline.
The oil in a 2004 Honda Civic GX should be changed approximately every 5,000 miles or as recommended by the owner's manual based on driving conditions.
The recommended tire pressure for the 2004 Honda Civic GX is typically 32 psi for both front and rear tires. Always check the specific values indicated on the driver's side door jamb or in the owner's manual.
To reset the maintenance required light, turn off the engine, press and hold the trip button on the odometer, then turn the ignition switch to the 'on' position without starting the engine. Hold the button until the light turns off, which should take about 10 seconds.
The 2004 Honda Civic GX is not designed for towing, and it is generally advised not to tow with this vehicle.
To replace the air filter, locate the air filter housing in the engine compartment, unclip or unscrew the housing cover, remove the old filter, and insert the new filter. Ensure it fits securely, then reattach the housing cover.
Common issues include problems with the CNG fuel system, such as clogged injectors or pressure regulator issues. Regular maintenance and inspection of CNG components are essential for preventing these problems.
To check the transmission fluid, park the vehicle on a level surface, warm up the engine, then locate the transmission fluid dipstick. Pull it out, wipe it clean, reinsert it fully, and then remove it again to check the fluid level against the marked indicators.
To jump-start, connect the positive cable to the positive terminal of the dead battery, the other end to the positive terminal of the good battery, then connect the negative cable to the negative terminal of the good battery, and the other end to an unpainted metal surface on the engine block of the dead vehicle. Start the donor vehicle and then the Civic.
To improve fuel efficiency, ensure regular maintenance such as tire pressure checks, air filter replacements, and proper alignment. Additionally, avoid excessive idling and aggressive driving habits.