CODE P0174 RUNNING TO LEAN

  • Tiny
  • Wayne1988
  • 2007 PONTIAC G5
  • 140,000 MILES

I have a 2007 Pontiac g5. My ce just came on and the code is p0174 which is the car is running to lean.I looked for leaks but nothing visible?

When I'm giving it the gas I can hear a rattling noise from my exhaust up from somewhere

Do you
have the same problem?
Yes
No
Sunday, September 23rd, 2012 AT 12:34 AM

6 Replies

  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

174 could be a vacuum leak, low fuel pressure or a bad mass air flow sensor.

Roy

Was this
answer
helpful?
Yes
No
Sunday, September 23rd, 2012 AT 12:45 AM
  • Tiny
  • Wayne1988
  • MEMBER

How do I check for these possible problems without have to take it to a mechanic

Was this
answer
helpful?
Yes
No
Sunday, September 23rd, 2012 AT 1:18 AM
  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

You need a fuel pressure gauge, and a scan tool to monitor the long terms. Not really a job for home. At least get a diag to confirm the failure as guesses are expensive and most of the time wrong

Roy

Was this
answer
helpful?
Yes
No
Sunday, September 23rd, 2012 AT 1:24 AM
  • Tiny
  • Wayne1988
  • MEMBER

Don't know if this will help but when I fill my car up with gas my ce goes off

Was this
answer
helpful?
Yes
No
Sunday, September 23rd, 2012 AT 9:34 PM
  • Tiny
  • ASEMaster6371
  • EXPERT
  • 25,554 POSTS

With the 174, it should not effect it.

Roy

Was this
answer
helpful?
Yes
No
Sunday, September 23rd, 2012 AT 9:47 PM
  • Tiny
  • Wayne1988
  • MEMBER

So turns out I have a leak at flexpipe infront of my o2 sensor. I was wondering how do I know what kind of cat my car has? Or if I could put a aftermarket one on with my oem exhaust? My flexpipe and cat are one assembly. Thx

Was this
answer
helpful?
Yes
No
Tuesday, September 25th, 2012 AT 2:21 AM

Please login or register to post a reply.

Other P0174 Questions