Spark Plug Malfunction A Silent Saboteur of Your Vehicle's Performance

You probably did not properly torque the new spark plugs. If they are even a little bit too loose you will get a check engine light after a few days of driving. (1) Defective Spark Plugs or Wires. A malfunctioning spark plug or wire can cause your vehicle to misfire or run erratically, signaling the ... A defective, old or dirty spark plug can cause the engine to misfire. If your check engine light is always flashing, please contact our team of automotive ... Brief explanation of causes and conditions of the Check Engine Light Illumination. Worn spark plugs are another common problem that can cause your CEL to illuminate. If the plugs are worn down—or the ignition coil, which provides the ... Spark plugs: ... Old spark plugs and wires can reduce the performance of your car and cause your fuel economy to decrease. When these need to be replaced due to ... Dirty spark plugs can cause misfires as partially burned engine oil can prevent the plugs ... Old spark plugs can simply break and fail to produce a spark. Hey all- Today I replaced my spark plugs and engine air filter and everything went well, however the check engine and VSC TRAC lights are now on and I. I've had my Check engine light on for a couple of months. I took it to the dealer and was told that it was code P0171 - System Too Lean - Bank No. 1 (and ... Bad spark plugs are among the many potential causes for your check engine light to appear. In this case, the check engine light typically ...