Loud noise and codes
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Joined: May 2007
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Loud noise and codes
I have a 97 F150 with 152000 miles and 4.6l v8. Lately when I start the truck after it has sat overnite or of a long duration I will here a loud almost sounds like a vacuum noise from the engine. It eventually goes away and won't do it if I start it up during the day after it has ran a few times. I'm also getting a check engine with codes p1151 and i forgot the other one i will write it when i get home. I have had a few tell me to replace the PCV and PCV hose and a few tell me that it is all my O2 sensor. Any advice would be greatly appreciated. Thank you.
Senior Member
Joined: Oct 2009
Posts: 2,581
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From: Corona, Crazyfornia
The 1151 code is lack of switching on the rear O2 sensor bank 1. The other code would be very helpful to help pin point your problem.
I'm guessing it will be P0171, but post it up when you can.
I'm guessing it will be P0171, but post it up when you can.
Senior Member
Joined: Dec 2006
Posts: 43,532
Likes: 817
From: Joplin MO
http://www.obd-codes.com/p0153
Bank 2 is driver's side.
Bank 2 is driver's side.
What does that mean?
This involves the oxygen sensor upstream the catalytic converter on Bank 2. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.
Symptoms
You will likely not notice any drivability problems, although there may be symptoms.
Causes
A code P0153 may mean that one or more of the following has happened:
The oxygen sensor is faulty
The wiring to the sensor is broken / frayed
There is an exhaust leak
Possible Solutions
Things that may fix the problem include:
Check and fix any exhaust leaks
Check for wiring problems (shorted, frayed wires)
Check the frequency and amplitude of the oxygen sensor (advanced)
Check for a deteriorating / contaminated oxygen sensor, replace if necessary
Check for inlet air leaks
Check the MAF sensor for proper operation
Replace the Bank 2 oxygen sensor upstream of the catalytic converter
This involves the oxygen sensor upstream the catalytic converter on Bank 2. This code indicates the engine air fuel ratio is not being adjusted by the oxygen sensor signal or the ECM as expected to do so, or not adjusted as often as expected to do so once the engine is warmed or under normal engine use.
Symptoms
You will likely not notice any drivability problems, although there may be symptoms.
Causes
A code P0153 may mean that one or more of the following has happened:
The oxygen sensor is faulty
The wiring to the sensor is broken / frayed
There is an exhaust leak
Possible Solutions
Things that may fix the problem include:
Check and fix any exhaust leaks
Check for wiring problems (shorted, frayed wires)
Check the frequency and amplitude of the oxygen sensor (advanced)
Check for a deteriorating / contaminated oxygen sensor, replace if necessary
Check for inlet air leaks
Check the MAF sensor for proper operation
Replace the Bank 2 oxygen sensor upstream of the catalytic converter