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Start the engine and turn on the head lights and rear screen heater then check the battery voltage, it should be 13-14 volts. If it is less than 13 volts, then your alternator is faulty. If the CEL came on while starting the engine it could be the low battery voltage that confused the ECU. It is possible that something is drawing power from the battery ...


As this article points out, the ability to blink codes was available with older OBD-I vehicles. Once the OBD-II standard hit, the ability to "blink" out codes was lost. This changeover to ODB-II happened in 1996 for vehicles sold in the US. I know the same is true for Volkswagen cars. Early models had the ability to blink out the codes when something was ...

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