This usually happens when the ECM spits out several
diagnostic trouble codes at once..
Not exact matches
P2015 is a generic OBD2
diagnostic trouble code point
at a malfunction with the intake manifold runner position circuit.
The cause behind
diagnostic trouble code P0171 is easiest to find by looking
at the secondary firing patterns on the Bank one cylinders.
Inasmuch as the check engine light has illuminated,
diagnostic trouble codes have been stored in your car's engine computer (PCM) and those
codes, once downloaded, will probably reveal
at least the general cause of the problem you are having.
If the problem is engine related (and not stuck brakes or a locked up transmission), the first thing to do is apply a real time
code scanner and both download any stored
diagnostic trouble codes and look
at real time...