The process of repairing a P0303 code for a Toyota, Jeep, Ford or another vehicle depends on what the diagnostic test uncovers. The price to correct a P0303 code issue can also vary widely depending on the cause. In some cases, a quick spark plug replacement for all cylinders will elimin...
During startup, my engine is misfiring, and it's getting worse, up to a minute last night and it through P0300, 301, 302, and 303, the misfire code. When I press the brake pedal, the roughness settles down a little, and when I life my foot off the brake, it gets rougher. If ...