Nissan Frontier cranks a long time before starting. Especially when cold. Used to shut off once in a while when running. Changed Camshaft A - Bank 1 sensor and that went away but still hard to start when cold have P0340 Code for the same camshaft sensor. Could plug/wire to camshaft sensor be bad? Or possibly another problem as well?
Check you battery and the charging system first. Then check the starter motor.
Did you use new OEM sensors?
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