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lean banks 1 and 2 code

  • Thread starter Thread starter Bjames
  • Start date Start date Jan 9, 2024
  • Tags Tags
    code new edge gt p0174
B

Bjames

Member
Jan 9, 2024
5
1
13
Massachusetts
Jan 9, 2024
#1
  • Jan 9, 2024
  • #1
so my 2002 gt 5 speed is throwing a code for lean in banks 1 and 2 and one for high evap pressure I thought this was injectors because it sounded bad but sounded to be running rich to i replaced the injectors and then cleaned the ICV due to an idle issue and replaced the gasket. Now the code is still showing up and im not sure if its just a bad 02 sensor ( not completely sure i have 02 sensors and doubt they work) or if this is a problem. my other two ideas are that its an intake leak or a possible tuning issue if the prior owner had tuned for bigger injectors. if any one has any clue please lmk thank you.
 
N

Nightmare_GT

Member
Jan 6, 2024
26
2
13
Texas
Jan 9, 2024
#2
  • Jan 9, 2024
  • #2
Check for vacuum leaks. Check the PVC elbow and hose as those are known to leak.
 
B

Bjames

Member
Jan 9, 2024
5
1
13
Massachusetts
Jan 9, 2024
#3
  • Jan 9, 2024
  • #3
Nightmare_GT said:
Check for vacuum leaks. Check the PVC elbow and hose as those are known to leak.
Click to expand...
Ok thank will. Thanks
 
A

alwayshi

Active Member
Feb 22, 2019
113
17
28
Hawaii
Jan 10, 2024
#4
  • Jan 10, 2024
  • #4
Ohhh, you didn’t mention BOTH banks in my thread.
How’s your MAF? Any way to read live data thru a scanner?
Clean the MAF first and update (update if you can read live data as well).

When I had a 2000 GT, a bad MAF gave me both p0171 and p0174. Easily diagnosed with the SCT reading live data. No matter what rpm, it read 1.0 haha
 
N

Nightmare_GT

Member
Jan 6, 2024
26
2
13
Texas
Jan 10, 2024
#5
  • Jan 10, 2024
  • #5
Your MAF reading was 1.0 at all times? Asking because Im getting 1132 and 1152 rich codes.
 
N

Nightmare_GT

Member
Jan 6, 2024
26
2
13
Texas
Jan 10, 2024
#6
  • Jan 10, 2024
  • #6
.
 
A

alwayshi

Active Member
Feb 22, 2019
113
17
28
Hawaii
Jan 10, 2024
#7
  • Jan 10, 2024
  • #7
Nightmare_GT said:
Your MAF reading was 1.0 at all times? Asking because Im getting 1132 and 1152 rich codes.
Click to expand...

Yup. At idle, at 1500rpm, 2000rpm etc.
it just ready 1.0 and did not change voltage. Even after I cleaned it thoroughly with a MAF cleaner..it was just dead
 
B

Bjames

Member
Jan 9, 2024
5
1
13
Massachusetts
Jan 11, 2024
#8
  • Jan 11, 2024
  • #8
alwayshi said:
Ohhh, you didn’t mention BOTH banks in my thread.
How’s your MAF? Any way to read live data thru a scanner?
Clean the MAF first and update (update if you can read live data as well).

When I had a 2000 GT, a bad MAF gave me both p0171 and p0174. Easily diagnosed with the SCT reading live data. No matter what rpm, it read 1.0 haha
Click to expand...
ok thanks ill run that and post an update

odly enough when i went to look at it two days ago the codes had gone away im guessing its a bad sensor
 
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