This is a HHR with 147,000 starting showing this code, does anyone have and idea what this is?
Jim W

 

A code P0174 may mean that one or more of the following has happened....

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled.

There could be a vacuum leak downstream of the MAF sensor.

The MAF sensor connection is loose or the wiring harness is damaged.

Possible solutions include.....

Cleaning the MAF sensor.

Checking for a loose connection or damaged wiring.

If your code was a P0171, that usually points to a bad oxygen sensor, but P0174 codes are almost always MAF related.

 

A DTC P0174 only applies to lean bank 2, which no HHR has!!

 

OK Jim, after getting some clarification from JoeR(Thanks by the way), and digging into this a bit more, double check the code being displayed.

P0174 being displayed on an HHR is spurious, but its more likely that you might have a P0171 or P0172 code being stored.

Those are system rich or system lean codes.

 

clean your MAF sensor?

 

Thanks for the info. My wife's 2011 started it today with the P0172 code. It showed it twice with the second showing a Pd symbol next to it on my CP9125 code reader. That puzzles me. I reset it and she is out driving it. I'll do some cleaning and checking even if it doesn't come back.

 

Fixxed itself. Leading up to Hurricane Issac, she filled up with high octane (onlything available) and that's what caused it. Once we ran a few tanks of regular and it cleared up.