Ford F-150 - 1997-2003 :: Bank 1 Or Bank 2 Too Lean Codes At Idle When Started Cold?
I've been having this problem since I've gotten the truck about year ago. it has very high long-term fuel trims and it seems no matter what I do I cannot get them to go down my fuel trims at idle are 39 Bank1 and 33 bank2 they go down to around 12>7 while driving what could this mean. And even weirder occasionally I get Bank 1 or bank 2 too lean codes at idle when cold starting???? 1997 Ford F150 4.6 ......
View 7 RepliesFord F-150 - 1997-2003 :: CEL On - Bank 1 And 2 Lean?
What does this mean?? The o2 sensor(s) is reading lean?? 2001 F150 4x4 5.4
There was also an evaporator system code, but I think maybe someone left the gas cap loose? I unhooked the battery and it cleared everything. Truck started fine for a few tries. Will have it driven tomorrow to see if codes come back.
My reason for this is it was getting hard to start. I confirmed that fuel pump relay was not coming back on when cranking every time. Randomly it's fine, other times it won't start. Noticed it had CEL light, had it read at local Azone.
Don't know what to do about the "lean" issue? What would tell the pump relay to NOT turn on?
I removed the cover from the relay and inspected points, they were fine. Check with ohm meter=good. Watched it function without the cap on it. Would prime every time, but not come on when cranking every time.
Ford F-150 - 1997-2003 :: Bank 1 Too Lean Code
Well I got the ubiquitous "Bank 1 Too Lean" code this morning. Yesterday I changed out the PVC Valve, Elbow and Hose assy.
I changed out the hose from the intake to the canister purge valve on the firewall next to the master brake cylinder, that one was like dust.
Today I'm changing out the rear O2 sensors, but I may change out the fronts when they get them in (very rural area hear).
I'll keep looking for vacuum leaks and change out the MAF sensor. I hate to think it may be the intake....
Ford F-150 - 1997-2003 :: Rough Idle - Right / Left Bank Too Lean?
I have a rough idle. I have replaced upstream o2 sensors, plugs, wires, fuel filter, dpfe sensor, cam sensor, and cam synchronizer. This has only moderately improved my problem. I still have the right bank, left bank too lean codes. Could it be something as simple but hard to find as a vacuum leak?
View 8 RepliesFord F-150 - 1997-2003 :: Codes P0304 And P0316 - Lean Bank 1 And 2
2003 F150 v6 2wd 170k ... For a year I've only had codes P0171 and P0174 (lean bank 1 and 2). I was told it wouldn't hurt anything... I think now I should have taken care of it.
Anyway 3 weeks ago my truck started running a little rough. It was sputtering and had trouble getting up to speed, sometimes also the air switches from vent to defrost until switch gears and rpms go down. It gradually got a lot worse over 10 days while part was otw. A week ago i changed MAF and cleaned the black thing it's inside of. It started running better but still not good. I pulled my small trailer 2 days ago and it got worse after dropping the trailer.
Today checked codes at AZ and lean codes are gone and have p0304 (#4 misfire) and p0316 (crank sensor problem). Is this related.? Also Right before all the trouble I changed battery and alternator. Also i read online that MAF needed 2 weeks to relearn the way I drive to get correct gas/air ratio? Is that correct?
Also I read so many different things I needed to do during installation... Some say I need to turn key to the on position after unplugging old MAF then plug new one in... turn key to on position 10 times, Rev up engine, drive it rough for the first 2 minutes... etc. Is there a correct way to do it or is it vehicle specific?
Should I start by changing spark plugs and coils? The guy i bought it from and trust said he changed spark plugs right before I bought it. Will it ruin truck if I drive it? I've read so much but everyone says so much different things on the same topic. I'd what to start with or if this is related.
Ford F-150 - 1997-2003 :: Codes For Large EVAP Leak / Cylinder 6 Misfire / Bank 2 Lean
Here are the codes I'm getting:
P0455 - large evap leak
P1451 - main control (evap canister)
P0306 - cylinder 6 misfire
P0174 - bank 2 lean
are these all related? Or two separate issues. I have replaced all the evap lines with new lines. I have a new egr valve, and exhaust manifolds, and what should I look at 1st
Ford F-150 - 1997-2003 :: 1999 - Check Engine Light Codes P0171 And P0174 Lean On Bank 1 / 2
I have a 99 f150 with the 4.2l v6 with a 5 speed 173000 miles. I picked it up not to long ago. When I first got it it had both the P0171 & P0174 lean on bank 1&2 it was also siting for a while. I replaced the fuel filter which was filled with black fuel, also changed the PCV valve, cleaned the MAF sensor, and changed the oil. I cleared the code, drove it for a little bit and the light came back on after 20 miles.
I then proceeded to replace the upper and lower intake manifold gaskets. Upon doing that i noticed that i was missing one of the linkages for the IMRC. I went to the junkyard and pulled off another linkage rod off the same motor. ordered new plastic clips, put the IMRC on cleaned everything up and began putting it back together. I also cleaned the Injectors while i had them out as well and put in new spark plugs and wires.
Put everything back together. code was cleared since the battery was disconnected. drove it and then the engine light came back on again. this time it was only the p0174. so i then both the upstream and downstream O2 sensors on bank 2, reset the code and it came back on again. I'm lost.
Ford F-150 - 1997-2003 :: 1999 - Check Engine Light Came On / Code P0171 / System Too Lean Bank 1
I just bought a 99 f150 and the check engine light came on with code p0171,system too lean bank 1. It runs and drives fine but has a strong smell of gas when I shut it off.
View 4 RepliesFord - Explorer :: 2003 V8 - CEL Came On - Too Lean Fuel Bank 1
Explorer 2003 - 116 mi V8... Has been idling poorly at about 750 / 800 rpm never stalls in idle.
Check Engine Light came on - Read code said Too Lean Fuel Bank 1
Reset codes. After a couple hundred miles Check Engine Light
Once again Check Engine Light
Same error code Too Lean Fuel Bank 1
Ford F-150 - 1997-2003 :: 2002 - Cylinder Misfire And A Lean Code
My truck was running fine the past few days minus a cylinder misfire and a lean code the misfire was due to a coil pack being out no big deal on that part but yesterday on 7/30/13 my temp gauge turned off my truck wouldn't go below 1k rpms and then the over heating light came on. i drove the one mile home and turned it off an hour later i went back out to my truck to get to work and it refused to start.
I decided to just hold my foot down on the gas and crank it and it eventually started drove it to work with the same symptoms. now today its doing the same thing except now the truck is broke down in the parking lot at my job the engine is flooding cause i can smell it last night i changed the thermostat. I can get so that i can get my truck up in running its a 2002 f150 5.4L 4x4....
Ford F-150 - 1997-2003 :: Vacuum Leak / Bank 1 Is Slightly Higher Than Bank 2
I am in the process of trying to chase down a vacuum leak on my 2003 F150 with the 5.4. I have checked all lines and cannot find it. I decided to check the long term fuel trim and noticed that my bank 1 is slightly higher than bank 2 (screenshot attached). Is this enough to assume the leak is on the bank 1 side?
View 14 RepliesFord Fuel System :: 2003 F150 - Service Light Randomly Comes On / Code For Left Bank Running Lean
2003 f150 supercrew with 166,000 miles on it. Daily driver. Service light randomly comes on and when code reader was put to it shows "left bank running lean." Will clear it and will randomly come back on. Truck seems to be running fine. No issues engine. Bad sensor? Or bad injector? Maybe way to test?
View 1 RepliesFord F-150 - 1997-2003 :: Diagnostic Code P0401 - Insufficient EGR Flow
My 2001 F-150 came up with this code and I changed the EGR valve cleared the code and it returned 15 miles later. The truck only has 30K miles and the warranty expired 24 May.
View 14 RepliesFord F-150 - 1997-2003 :: 1999 V6 - Code P0401 / Insufficient EGR Flow
Dreaded insufficient EGR flow. I've read I should clean the EGR ports.
I can't really find where these are? I took the throttle body off.
What I should do with this thing? I also get a hesitation on initial take off.
1999 F150 4.2 V6 ... 160k miles on it. Runs good otherwise.
Ford F-150 - 1997-2003 :: P0401 - EGR Insufficient Flow / P0455 Code
Has a P0401 code EGR unSufficient flow. Ive read several things that it could be, from a DPFE sensor to the EGR valve it's self our that the port going into the TB could be plugged. Truck drives fine does not have a miss or anything noticeable when driving other than the CEL, trucks a 4.6 with 200k on it. Forgot to mention it sometimes gets a P0455 code but i assumed that is gas cap. or could it be related?
View 7 RepliesFord F-150 - 1997-2003 :: CEL Came On - Diagnostic Tool Reads Code 401 / EGR Insufficient Flow
I just bought a 1997 ford f-150 4x4 with 4.6 motor. the check engine light came on. My diagnostic tool reads code 401 (egr insufficient flow). I've replaced on the parts on the egr side of engine. light still on. could it be a leak in the vacuum lines. I don't see any wear.
View 4 RepliesFord Aerostar :: 1996 - Lean Mixture On Bank 1
I got a CEL on my 96 4L EXT,130,000 mi. The guy that read it said it was lean mixture on bank 1. He also said a good start would be to pull the MAF and clean it and pull the EGR and clean and check it. I did that. While I was at it, I pulled the spark plugs, the IAC solenoid, purge solenoid. Going to also change the plug wires. Changed the O2 sensors 200 miles back.
I can't remember the code number. The items i have pulled and looked at seem to look OK. No plugging, if i connect a 12v source to the solenoids they react, if i pull vacuum on the EGR , the valve seat opens and closes. (Doesn't seal tight, but I wouldn't expect it to)
Question -----I pulled the DPF module mounted above but connected just below the EGR inlet pipe. How does this thing work? Is there a way to determine if it is faulty or not? It has two hoses in and a 3 prong connector on it.
FWIW---The best way I found to get the plug wires off was to push/pry "backwards" from the base of the boot, rather than pull for days until it comes off! Still a beast but a little faster I found.
Ford - Explorer :: 2004 - Getting Bank 1 And 2 Lean Codes?
My 04 Explorer 4.0 has been giving me the bank 1&2 lean codes. It is the fully electronic throttle body not mechanical. It seems from reading that in 04 is when they switched to the electronic version. Here are some things I have done to resolve this. I created a diy smoke machine from a paint can and air. I found a leak by the egr.
I replaced the egr and gaskets, along with the metal part that goes into the throttle body. I replaced the pcv and hose(although it looked fine). I replaced my intake gaskets. I replaced the MAF sensor.
Before all of this my lt fuel trims were +25 for both bank 1 & 2. After doing all of this my trims did come down a little to Bank 1 +16 and bank 2 +23. I dont know what to check next!
Ford F-150 (2004-2008) :: Cylinder 2 Misfire And Lean Fuel Bank 1
I am getting cylinder 2 misfire and lean fuel bank 1. change the coil and didnt fix the misfire.
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