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Originally posted by brett64:
I replaced the bank 2 sensor because the shop that installed a new clutch, etc. pinched the wire and it was measuring 5.8 ohms. I figured that it was sending a low signal back to the PCM which was richening the fuel mixture then causing the PO172 code. So while I was under the car one day I decided to switch the two.
The freeze frame I have is:
RPM 2713
CALC Load % 12.2
Coolant temp. 183
LT FTRM 1 % -24.2
ST FTRM 1 % -6.3
LT FTRM 2 % -18.8
ST FTRM 2 % -7.0
Veh. speed 45
Fuel sys 1 CLSD
Fuel sys 2 N/A
I don't have a clue what all this means.
I suspect your thermostat is stuck on open and hence keeping the engine cool or ECT sensor is broken (connector/wire broken). The thermostat is supposed to open at 195 F. It appears that it opened much earlier and then the engine went to closed loop. At that time, the engine was still running rich. The PCM usuallly ignores the rich condition when the engine is in open loop but in your case, it was just enough to go to closed loop. If you look at the Bank 2 Long Term Fuel Trim, it is also on the high side. With continued driving, you will also get a P0175 (Bank 2 rich condition). I would check/change the the thermostat and/or ECT sensor.
Thermostat ($12)
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/c8/7d/0900823d801bc87d.jsp
Test the ECT sensor ($17).
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/ca/ba/0900823d801bcaba.jsp
Location of ECT sensor
Check the wiring at the connector first.
Here is a post from Chongo. It highlights the ECT sensor.
Originally posted by chongo:
Did someone call me out.......LOL
here you go. 
Last edited by Tony2005; 07/23/06 02:33 AM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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The thermostat is 188 degree it appears to start opening around that temp. The car warms up quickly and the temp gauge stays near the center or to the cool side of the center.
What degree thermostat should be in this car?
I could not make out the ohm resistance chart for the ECT sensor that is in the Autozone instructions, so I have not checked it yet.
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Originally posted by brett64:
..What degree thermostat should be in this car?
...
Stock was 195 F. Some with Zetec I-4 use the 185 F due to the "perceived" overheating. Most Duratec V-6 do not have the "perceived" overheating. If the Duratec overheats, it overheats!
What are the PIDs when the car is running (and warmed up)? Try that and see what they are. It might give more clues.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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I am going to put a new thermostat in since I have it out and can get a new one so cheap. Just to see if that changes anything.
What PIDS are you talking about, all of them? Do they change when driving or stay the same as idling?
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What you have posted are freeze frame data (at the time, the P0172 code was recorded in the PCM). IIRC, the CP9145 is capable of real time scanning and records the parameters for a couple of minutes (maybe 15?) while driving. You can download the data on a printer or write it down. Then you can see what is happening at various RPM and speeds.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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I can't drive the car right now to monitor whats going on, but I will in a few days and post what comes up.
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I put a new 195 F thermostat in and cleared the codes. The car stalled at a stop sign but restarted. It was acting like it was starving for fuel for a moment then began to run a little better but still not like it should. After driving about 5 miles code P1132 was sent (Mfg fuel air mixture out of range) or something like that. Here is the freeze frame:
RPM 3094
Calc load % 20.4
coolant temp 189 F
LT FTRM1 % 0.0
ST FTRM1 % -20.3
LT FTRM2 % 0.0
ST FTRM2 % -18.0
Speed 52
Fuel sys CLSD
I cleared the codes again and drove about 18 miles. This time no stalling but still sluggish. As I drove I noticed the fuel sys. was going from open to closed. When I come down a hill and let totally off the throddle the fuel sys. opens when I press the pedal lightly the system closes when I press harder the system opens again. Is this normal? However no codes were sent during this drive cycle.
I have not learned how to download the info. for the scanner yet.
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P1132 Insufficient switching Bank 1 Upper Sensor/Rich
Have you tested the ECT sensor yet?
You should also test the Bank 1 (firewall side) Upper O2 Sensor.
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/ca/83/0900823d801bca83.jsp
Originally posted by Ray:
If you are getting a rich code set on only one bank, you need to look for something that can affect only one bank.
Things to look at:
......faulty O2 sensor on that bank .......
Bank 1 Upper O2 sensor how to.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=v6maint&Number=1023736&Forum=v6maint&Words=replace%20o2&Match=And&Searchpage=0&Limit=2500&Old=allposts&Main=1023736&Search=true#Post1023736
From TSB,
P1132 - Lack of HO2S-11 Switch, Indicates Rich. When an HO2S sensor indicates rich at the end of a test, the system is trying to correct for an over-rich condition. The code is set when the fuel control system no longer detects switching for a calibrated amount of time.
Electrical:
�· Short to VPWR or VREF in harness or HO2S
�· HO2S circuit shorted to Ground
�· Water in harness connector
�· Open circuit
�· Corrosion or poor mating terminals and wiring
�· Damaged HO2S
�· Damaged PCM (other DTCs should be present)
Fuel System:
�· Excessive fuel pressure (stuck fuel pressure regulator, restricted fuel return lines, etc.)
�· Leaking/contaminated fuel injectors or fuel pressure regulator
�· Low fuel pressure or running out of fuel (fuel pump concern, fuel supply line restrictions, low fuel level, etc.)
�· Vapor recovery system (stuck VMV, etc.)
Induction System:
�· MAF contamination
�· Air leaks between MAF and throttle plate
�· PCV system / Other vacuum leaks
�· Improperly seated engine oil dipstick
EGR System:
�· Leaking gasket
�· Stuck EGR valve / Leaking diaphragm or EVR
Base Engine:
�· Oil overfill
�· Incorrect cylinder compression
�· Exhaust leaks before or near the HO2S
�· Secondary air stuck on
Last edited by Tony2005; 07/29/06 02:36 AM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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I drove the car again for half an hour for a total of 35+ miles and still no codes were sent. The car ran great this time.
I left out one thing in my last post about the fuel system going closed to open(1) I read the fuel system will go to open1 in these conditions.
Is there not a code for the bank 1 HO2S?
I think I will drive some more to see if the car will send any more codes.
How many miles do you have to drive before the car is ready for an emissions test?
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"Is there not a code for the bank 1 HO2S?"
P1132 is Bank 1 Upper Sensor (a.k.a. HO2S11) code.
"How many miles do you have to drive before the car is ready for an emissions test?"
It is not miles. It is the OBD II cycle you have to go through.
This will describe the Inspection/Maintenance monitors and the OBD II drive cycle.
http://www.obdii.com/drivecycleford.html
Last edited by Tony2005; 07/30/06 01:00 AM.
"Always do the cheap and easy ones first."
1996 V6 ATX 96K miles
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