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2003 Lincoln TC, ?'s regarding current engine issues & 2 OBDII codes shown.
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Tidbit96
New User
Aug 28, 2019, 3:40 PM
Post #1 of 4
(1478 views)
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2003 Lincoln TC, ?'s regarding current engine issues & 2 OBDII codes shown.
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First off I'd like to thank all of the Professionals & affiliates of this forum for offering your time to hopefully help the "D.I.Y." mechanics. This is my 1st post here so I'm hoping I get better answers here, then at repairpal cuz honestly the 3 "Professionals" they offer on that forum give answers that make them sound like they think they're mechanic God's & the rest of us are all remedial helmet wearing kids trying to fix our cars with Fisher Price tool sets..... I frankly couldn't handle it anymore & just found this site last night & y'all seem much more professional & respectful so hopefully this is a better forum for me.
Ok to my issue, I have 03' Lincoln TC Signature series w/a 4.7L V8 it has roughly 115k miles give or take 2k. Bout 2-3 months ago I started to notice a significant shaking/shuttering that at first I felt was gonna be a transmission issue cuz the ONLY time these shaking spells happened was right at the upper RPM JUST b4 the transmission shifted up, sometimes right as it shifted even. I noticed it happened the most on interstate & it seemed the warmer it was outside,(meaning my A/C would be on fairly high inside the car)the more often it happened as well as the more severe the shutter would be... In fact it got to the point where if it was hot out & I was on interstate I drove w/the windows down & no A/C just to try & keep the incidents from happening so often. Well I originally posted this issue on repairpal & got a response that often engine misfire can be mistaken for a transmission shutter.... & Although I still felt like it was a tranny issue I didn't argue w/the Tech's reply but I did purchase a new Bluetooth OBDII reader on Amazon to see if it would help shed some light on which possibility it might have been transmission or ignition or what. Anyways after plugging it in I got 2 codes I wasn't exactly sure of what they meant or how I go about resolving these 2 issues OR weather these 2 codes are the culprits causing my issue. I didn't get any response about them on repairpal at all, however I will say in the meantime I've begun to believe the engine misfire suggestion over transmission due to the fact that just recently within the last week my car started to run really rough for ex. It takes more cranks of the starter before it fires up & when it's idling or when I'm at a stop sign it's nearly died a few times, I have to shift it to neutral & keep the RPM up just to keep it from dying.....
Anyways here are the 2 codes my reader registered The 2 codes are listed as-
*P1151-Lack of HO2S21 Switch- Sens Indicates Lean
& the 2nd Code,
*P1152-Lack of HO2S21 Switch- Sens Indicates Rich
Can anyone explain what these mean? I'm assuming based on the letters & words they are both referring to some type of either oxygen or fuel sensor. Code 1 indicating a lean mixture of oxygen or fuel possibly? Code 2 indicating the exact opposite, with a rich mixture? Am I anywhere close to the correct answer? & If not could anyone enlighten me on these 2 code readings & offer an opinion on any type of a solution I could go about to hopefully fix these issues? As well as do you believe these 2 codes might be the culprits responsible for my current engine issues? I apologise for the long post but I felt it'd be best, based off your suggestions on how to post, if I was thorough & as precise as possible. I greatly appreciate any help you can offer me with this issue. Thanks again to all the time you guys donate to help out all of us self proclaimed DIYer mechanics out here it's greatly appreciated!
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Hammer Time
Ultimate Carjunky
/ Moderator
Aug 28, 2019, 4:57 PM
Post #2 of 4
(1468 views)
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Re: 2003 Lincoln TC, ?'s regarding current engine issues & 2 OBDII codes shown.
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I'm going to lean toward the misfire scenario also.
Yes, those are lean codes. On a Ford the most common cause of that is a vacuum leak. Listen for a hissing sound when the engine is idling and try to follow the noise to it's source.
One of the most common sources on this engine are the main rubber connectors, usually for the PCV valve. Sometimes the hose rots out also.
The lean condition could contribute to the misfiring also.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 28, 2019, 7:11 PM
Post #3 of 4
(1459 views)
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Re: 2003 Lincoln TC, ?'s regarding current engine issues & 2 OBDII codes shown.
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Laugh - Fisher Price tool, toys etc! Better plastic for those things than what's in cars now and as old as this one!
As Hammer said look for and find any vacuum leaks. Fords (if you can brand name anything) had an era of lousy rubber as he just said should have failed a while ago already all be gone?
Plastic intake on this? I think front right corner could crack for a few model years about this year was also a plastic! That could cause vacuum and or coolant leaking any of that the misfiring.
Spare you the novel do you know how to check for vacuum leaks that don't just make a hiss you hear?
Just one for this time and car: Careful always of hot items just wiggle elbows gently see if you can make a hiss or change in engine behavior at idle should be obvious or a connection fall apart when doing that.
Have to rule that stuff out it is and was a problem.
A/C is just a load it doesn't like so far so don't worry on that for the problem just yet,
T
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Tidbit96
New User
Sep 4, 2019, 8:47 PM
Post #4 of 4
(1379 views)
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Re: 2003 Lincoln TC, ?'s regarding current engine issues & 2 OBDII codes shown.
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Wow thanks guys! This was the type of help I had hoped for at Repairpal but unfortunately received much more condescending statements more or less so I can't tell you how much this helps me & how thankful I am for your suggestions. As I mentioned I'm no certified mechanic but I've always had an ability to figure out things for the most part & eventually fix most anything I set my mind to accomplish however with how complex engine's are these days it just helps significantly when I have an idea of what I'm looking for so that's where your help is extremely important to me. I definitely miss the days when an internal combustion engine was simply that. Intake spark fire exhaust...what have you lol so having your guys input is what keeps me from completely dismantling my engine in hopes I could figure it out on my own. So a thousand thank yous for the help... I'm certain I'll be a frequent visitor to this forum for any future issues! So thanks once again for your help!
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