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1.8l

  1. Timsim9000

    AH astra 1.8L code (p0303)

    hello everyone can someone help me my astra has recently had a bad missfire code (p0303) and ive just changed the spark plugs and the coil packs and it’s done zero difference. Hoping someone has had the same problem. Any help would be appreciated. All it says on my cheap scan tool is cylinder 3...
    • Timsim9000
    • Thread
    • 1.8l ah astra code p0303 missfire
    • Replies: 11
    • Forum: Astra
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