Phaeton :: MIL Light On / System Too Lean Codes
Sep 23, 2013
I just got this car a 04 4.2l, put about 2000km on it and MIL light now on. Just got VCDS here is the scan.
I tried clearing the system too lean codes and shut off MIL and engine ran poorly, I think that is the cyl misfire codes.
Car runs fine with MIL on, averaging 10.8 l/100km hwy driving, but need to get emission tested and here in Ontario, they read the obd.
VCDS Version: Release 12.12.0 (x64)
Data version: 20130910
Monday,23,September,2013,19:21:03:35803
Chassis Type: 3D (3D - VW Phaeton (2002 > 2006))
Scan: 01 02 03 05 06 07 08 09 11 13 15 16 17 18 19 23 27 28 29 2E
34 36 37 38 39 46 47 55 56 57 65 66 68 69 71 75 76 77
[Code] ....
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My wifes 2007 Santa Fe Limited 3.3 has had a check engine light going on a year now. Car has about 122k on it now. Scanned codes about 6 months ago and had a fuel system lean code. Did some reading and ended up replacing the purge valve. The CEL stayed off til the end of the drive cycle and came right back. I have noticed when you fill the car up there is a real strong smell of gas but the car always starts right up. It now has a P0171 Fuel system too lean (b1) and P2187 Fuel system too lean at idle. Where to start. Don't have much background with hyundai. Also the ESC off light comes on randomly and goes off. Doesn't happen real frequently though.
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About a week ago the MIL came on and a VCDS scan (below) shows DTC P0171 & P0174 System Too Lean - MIL ON. I cleared the codes and the MIL came back on twice over the last week, both times with the same codes. I cleared the codes each time and it takes a while for the MIL to come back on. The car runs very good at speed but it has what feels like a little misfire at idle. This is especially noticeable when in gear, it seems the rpm drops a little bit every few seconds, but the time between those drops is not consistent. I made two videos to show this, see below.
I looked up the codes in the Bentley manual and it suggests the following:
SAE VAG Description
P0171 16555 System Too Lean Bank 1
Exhaust system
Exhaust system components, removing and installing
Fuel injectors
Fuel injectors, checking
[Code] .....
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It's really not relevant what brought up this question but do you think a broken dipstick tube can cause an engine to run lean and why do you answer that way?
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I am getting the dreaded emission workshop.
The codes i am getting are p0301-p0304 and p0171
Which are misfire on 4 cylinders and system to lean (bank 1).
Here is what I have done:
Got the 4 ignition coils replace, replaced the mass air flow, replaced the air filter, replace the plugs.
I just check the L wire and it doesn't have any cracks or holes
I don't know what to do next.
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I recently had some work done on my 2001 1.8t Passat. All new vacuum hoses & camshaft tensioner replaced by VW dealer. Check engine light is coming on and an independent shop near read out a code: Bank 1 mixture adaptation(multi): System too lean.
What does this mean??? And could this relate to these parts being replaced??? Work was done approx 2000 miles ago.
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I have a 2001 Passat 1.8T that has the pesky MIL light on with a DTC code P0171 lean system. I have sent it to the mechanic many times to no avail. What the mechanic did was replacement of the MAF, O2 sensors, checked intake manifold leak as well as exhaust manifold leak. His last attempt was to check for clogged injectors and fuel filter and they were in good condition. He says the ECM is bad. I was able to retrieve freeze frame data as well as live data which shows that the computer is compensating what it thought was lean by having very positive LTFT of 22.6. I don't believe the ECM is bad but cannot be sure. There is one more thing that was not checked by the mechanic is the EGR valve. Could that be the cause of my woes - the lean system?
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My 2006 W12 has been trouble free since taking delivery over a year and a half and 30K miles ago. Just broke 60K total miles over the weekend and the engine light came on. I have pasted the scan below. I cleared the codes and drove about 500 miles before the MIL reappeared. I have read this thread: [URL] ....
My first question is: Is there any harm in continuing to drive it?
I have visually inspected the secondary air injection system hoses and can't find anything glaring (no kinks, leaks, disconnections). I am open to taking the car to the dealership but I have low confidence in their diagnostic capabilities. I am fine with them doing work once we know what is wrong but I want to tell them what to do (replace a bunch of hoses for example). How to proceed?
Address 01: Engine Labels: 07C-906-018-BAP1.lbl
Part No SW: 07C 906 018 AJ HW: 000 000 000 00
Component: D1-6.0L-AT-LEV2 G 6722
Revision: --H01--- Serial number: VWZ3Z0E5400307
Coding: 0000173
[Code] ....
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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.
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My vehicle is a 98 F150 5.4 ltr Triton. I got a check engine light on and the error is "bank 2, system too lean." I read that this can be caused by a few different things like vacuum leaks or fuel filter and so far I haven't been able to narrow down. It started with occasional shaking at idle and its happening more as time goes. When at idle it often makes a sound like slurping the bottom of a drink with a straw and shakes intermittently. The fuel economy seems to have gone down. Sometimes it seems like it almost dies in idle, but always keeps running. It runs great when I push on the gas.
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We have a 2003 Passat 1.8t. Had the Check engine Light come on. Went down to AutoZone and hookeded up the OBDII reader. Came up with P0171, Fuel System for Bank 1 was too lean. Probable causes:
1. Fuel Pressure of MAF (If Bank 1 & Bank 2 set codes together)
2. O2 Sensor
3. Ignition Misfire
4. Fuel Injector Problem
Car has 60K - has always run well. Wife says she thinks it's running a bit sluggish. I rarely drive the car, but I think she's right. Car is not missing or running rough.
I cleared the code & started the engine; Check Engine Light is off; then looked at the codes and I find a P0171 (Pending). She tells me that the light has been on before & then gone away. So I guess it clears itself, but eventually comes back.
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This is the infamous error code many Accent owners might have experienced it. The code refers to "Too lean intake system". People try to replace all kinds of parts like ECM, MAF, O2 Sensor, TPS, Fuel Pump, Fuel Filter, etc. according to my research. I just bought a 2001 Accent and the P2188 light came on. I wrote an email to Hyundai Corp. Asking what would be the most likely part that will cause the (P2188) check engine light to come on.
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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.
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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?
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A few months ago I got a CEL, the problem was a lean condition on bank 2. Since then, that problem has happened again two or three times. Yesterday, I got the CEL again and now it's showing lean on both banks. When it was just the single side, I was thinking MAF, but now it's both I'm thinking possibly the fuel pump. The only other thing of note which may affect it is that I'm 90% sure the thermostat has been stuck open for the last couple of years, which presumably affects the map being used, it does throw an "implausible coolant temperature reading" fairly regularly in cold weather.
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Just put a cold air intake on my 99 f150 with a 4.6. its a CAI with a 4" tube and its not an oiled filter. there is NO vacuum leaks, the mass air flow sensor is clean. I am getting the codes 171 and 174 now and i know its from the intake because that's when it started running lean. Is there any way or anything i can adjust to fix this other than buying a 300 dollar programmer?? If I take it to a ford mechanic will he be able to fix this?
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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!
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My exhaust system warning light came on this afternoon. Think the cars needs to be parked until I can get it to the dealer.
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My mother-in-law has a Camry and she is pulling codes for running lean and airflow leak detected. The little red circled device mounted on the side of the air intake boot is hissing out air, yet I don't even know what the thing is called....
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Working on my son's 2001 sport trac. 200K miles but it has always been a great running truck.
I have two CEL codes:
P0171 System too Lean (Bank 1)
P0174 System too Lean (Bank 2)
I have found several issues so far, but have yet to get rid of these pesky codes.
So far I have changed:
- Intake Gasket - I had coolant loss which replacing this gasket fixed.
- PCV Valve and Hose - valve was damaged and the hose leaked.
- EGR Valve - Valve was leaking
- Fuel Filter
- Mass Airflow Sensor
The engine does appear to be running much smoother now, but the lean codes remain.
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2003 Sport Trac. My car was not starting, told my fuel pump, replaced twice and nothing. Found out about inertia switch and changed it, now car runs.
Before this switch blew out my car was running perfectly, no check engine, nothing. Now i have changed my fuel pump twice and put a brand new fuel filter in and soon after i get lean codes P0171 and P0174. My fuel pressure is 60psi at idle and drops to 0 after about 30 seconds when the car is shut off.
A lot of my intake is new since i did have a vacuum leak before, so i do not suspect that is it, especially since this happened after the new fuel pump. I am completely stuck as to what i should do. And i get hesitation when trying to accelerate sometimes
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