P0171 and P0172 - More info inside.
#1
P0171 and P0172 - More info inside.
Hey guys,
My X-Type threw a check engine light.
It's a 2003 Automatic, 2.5l 116k miles
Scanned it got P0171 and P0172 - both banks lean.
Looking at the live data, the Short term fuel trims seem fine (near zero), however the long terms seem way high, 17-18% at idle, however when you rev it they seem to come down.
Any ideas where to look? Every lean code I've seen on the 3.0 in the S-Type is usually accompanied by the short term fuel trims being high.
Thanks in advance,
George
My X-Type threw a check engine light.
It's a 2003 Automatic, 2.5l 116k miles
Scanned it got P0171 and P0172 - both banks lean.
Looking at the live data, the Short term fuel trims seem fine (near zero), however the long terms seem way high, 17-18% at idle, however when you rev it they seem to come down.
Any ideas where to look? Every lean code I've seen on the 3.0 in the S-Type is usually accompanied by the short term fuel trims being high.
Thanks in advance,
George
#2
#3
George,
You have a classic vacuum leak. Possibly IMT o-rings, pvc hose, brake booster hose, or o-rings between upper sand lower intake manifold. What you see is normal; the short term fuel trim will approach zero as long term fuel trim increases. If you clear the codes, the fuel trims will be zeroed. Then, short term fuel trim will be high and long term trim will be low...for a while.
You have a classic vacuum leak. Possibly IMT o-rings, pvc hose, brake booster hose, or o-rings between upper sand lower intake manifold. What you see is normal; the short term fuel trim will approach zero as long term fuel trim increases. If you clear the codes, the fuel trims will be zeroed. Then, short term fuel trim will be high and long term trim will be low...for a while.
#4
Join Date: May 2008
Location: Great Mills, MD
Posts: 14,278
Likes: 0
Received 3,846 Likes
on
3,162 Posts
#5
George,
You have a classic vacuum leak. Possibly IMT o-rings, pvc hose, brake booster hose, or o-rings between upper sand lower intake manifold. What you see is normal; the short term fuel trim will approach zero as long term fuel trim increases. If you clear the codes, the fuel trims will be zeroed. Then, short term fuel trim will be high and long term trim will be low...for a while.
You have a classic vacuum leak. Possibly IMT o-rings, pvc hose, brake booster hose, or o-rings between upper sand lower intake manifold. What you see is normal; the short term fuel trim will approach zero as long term fuel trim increases. If you clear the codes, the fuel trims will be zeroed. Then, short term fuel trim will be high and long term trim will be low...for a while.
I'll take a closer look at that stuff. Are both IMT's easily accessible on the X-Type. On the S-Type you have to pull the cowl and have gumbys hands.... By the PCV hose you mean the big plastic elbow right.
Seems like the steering rack is making noise when the car is COLD too. Ugh I think it may be time to get another winter beater.
Take care,
George
#6
That's what threw me off. I DID clear the codes, and the short terms will STILL near zero, and the long terms were high... I was like HUH??
I'll take a closer look at that stuff. Are both IMT's easily accessible on the X-Type. On the S-Type you have to pull the cowl and have gumbys hands.... By the PCV hose you mean the big plastic elbow right.
Seems like the steering rack is making noise when the car is COLD too. Ugh I think it may be time to get another winter beater.
Take care,
George
I'll take a closer look at that stuff. Are both IMT's easily accessible on the X-Type. On the S-Type you have to pull the cowl and have gumbys hands.... By the PCV hose you mean the big plastic elbow right.
Seems like the steering rack is making noise when the car is COLD too. Ugh I think it may be time to get another winter beater.
Take care,
George
#7
Trending Topics
#8
Hey guys,
My X-Type threw a check engine light.
It's a 2003 Automatic, 2.5l 116k miles
Scanned it got P0171 and P0172 - both banks lean.
Looking at the live data, the Short term fuel trims seem fine (near zero), however the long terms seem way high, 17-18% at idle, however when you rev it they seem to come down.
Any ideas where to look? Every lean code I've seen on the 3.0 in the S-Type is usually accompanied by the short term fuel trims being high.
Thanks in advance,
George
My X-Type threw a check engine light.
It's a 2003 Automatic, 2.5l 116k miles
Scanned it got P0171 and P0172 - both banks lean.
Looking at the live data, the Short term fuel trims seem fine (near zero), however the long terms seem way high, 17-18% at idle, however when you rev it they seem to come down.
Any ideas where to look? Every lean code I've seen on the 3.0 in the S-Type is usually accompanied by the short term fuel trims being high.
Thanks in advance,
George
#9
#10
I ordered IMT O Rings and a crankcase breather hose. This isn't my daily driver and I really don't have time to mess with cars during the week. I should have the parts today or tomorrow, and I'll swap them out this weekend if I have time and let you guys know how it goes from there.
Take care,
George
Take care,
George
Thread
Thread Starter
Forum
Replies
Last Post
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)