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Old 01-11-2014, 07:53 PM   #1
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2002 SE wagon Issues PLEASE HELP!

I have recently started have some problems with my 2002 ford focus SE wagon 2.0L DOHC. The codes I'm getting are as follows, p1120, p1780, p1000, p1101, p1650, p0172.

Its idling rough most of the time when I'm driving if I come to a stop it will studder and then die. also if i give it to much gas to rpm's lower and it wont engage.

I am getting codes for fuel to lean back 1, Mass air flow, throttle position sensor, and for some reason codes for a power steering sensor and some transmission sensor. I am in way over my head. I replaced both the MAF sensor and the TPS. It also has a new fuel pump, new spark plugs and wires, new canister purge valve, and I also I cleaned the hell out of the IAC. Nothing has made it better. Please Help!


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Old 01-11-2014, 08:31 PM   #2
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As a general suggestion, have you measured your electrical system voltage when the car is running? Sometimes something as simple as inconsistent system voltage (due possibly to a faulty alterantor volatge regulator or dying battery, for example) may provide insufficient working voltages to any number of sensors, creating all sorts of red herrings.

Any more detail on how or when the rough running started happening?
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Old 01-11-2014, 10:38 PM   #3
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it all started after my fuel pump went out. after i changed the fuel pump and the fuel filter it was just down hill from there. how do i check the voltage.
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Old 01-11-2014, 10:56 PM   #4
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P0172 - System too rich Bank 1 (O)
P1000 - Monitor Testing Not Complete * *
P1101 - Mass Air Flow (MAF) Sensor Out of Self-Test Range (O) (X)
P1120 - Throttle Position (TP) Sensor Out of Range Low (RATCH too Low) (X)
P1650 - Power Steering Pressure (PSP) Switch Malfunction
P1780 - Transmission Control Switch Out of Self-Test Range (X)


(O) = related to each-other
(X) = related to each-other

That sounds like a lot more than something simple. And to me none of them really make sense, combined. Individual they are easy enough to deal with.


This isn't one for the internet. Seek professional help.
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Old 01-12-2014, 08:27 AM   #5
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If this happened right after fuel pump change, I am guessing a short or broken wire issue. If wires especially a 5 volt reference is shorting out, you will not blow a fuse cause they are designed to be pulled down to ground.
Maf, TPS, and O2 sensor can throw a problem on each other. The others are probably tied together due to nature of problem.
Unless you can restep back your fuel pump change, make sure all wire runs are looking undisturbed, all connections hooked proper, read a diagram, and make voltage checks. You may have a hard time finding issue.
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Old 01-12-2014, 07:11 PM   #6
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is their a chance that it could be the ECC (electronic control computer)? i followed all the wires and didnt find anything. i also cleaned the egr and checked the o2 sensors and the cat.
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