Diagnostic Code P0111 P0122 P0133 P0511 P0522 P053 - Taurus Car Club of America : Ford Taurus Forum
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Old 02-03-2006, 04:51 PM   #1 (permalink)
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I have a 1996 Gen 3 Taurus with the 3 litre Duratec. The "Service Engine Soon" light is illuminating - the OBD 2 scanner detects coded P0111 P0122 P0133 P0511 P0522 P0533. The P500 series codes are all shown as 'pending'

I have checked the diagnostic decodes for all these - I cannot find a decode for P0511 - anyone know what this is??

As regards all the codes - the car runs fine - only exception would be difficulty starting (hesitates a bit initially and you need to make sure it catches and runs before releasing the starter) and sometimes the idle is a little rough - or it can on occasions stop while idling.

Where should I start??
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Old 02-03-2006, 05:23 PM   #2 (permalink)
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p0111-can't find
p0122-throttle position synsor (tps) cicuit low input
p0133-upstream heated o2 sensor circuit slow response (bank 2)
Po511-can't find
po522-^
po533-^
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Old 02-03-2006, 05:29 PM   #3 (permalink)
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the p0122 woulde be the the idle problem you have, ohh by the way my source is from the ford taurus and mercury sable 1996 - 2005 haynes repair manual.
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Old 02-03-2006, 06:30 PM   #4 (permalink)
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I dont think the p0122 would give you a rough idle, however any TPS throwing a code will most likley screw up your shift patern, and possibly cause harsh shifting. The car may be slower or unresponsive with this as well.

p0111- Intake Air Temperature Circuit Range/Performance Problem
p0122- Throttle/Pedal Position Sensor/Switch A Circuit Low Input
p0133- O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
P0511- Idle Air Control Circuit *
p0522- Engine Oil Pressure Sensor/Switch Circuit Low Voltage
p0533- A/C Refrigerant Pressure Sensor Circuit High Input

Its very strange to see all of these codes at the same time...
Have you tried disconnecting
the battery for a few minutes and reconnecting it to see if the codes come back?
It sounds like you have a bad ground somewhere or possibly a bad computer.

*The underlined and starred code is probably causing the rough/erratic idle.
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Old 02-06-2006, 03:13 AM   #5 (permalink)
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I followed tmonster's advice and cleared the codes and then waited for the inevitible relapse - sure enough new codes up today - P0171 and P0174 but none of the other codes are there (yet) - what can it all mean???
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Old 02-06-2006, 03:27 AM   #6 (permalink)
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I think it means you're low on blinker fluid.
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Old 02-06-2006, 05:41 AM   #7 (permalink)
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H41 DTCs P0172, P0174, P0171 AND P0175: FUEL SYSTEM AT THE CORRECTED FUEL TRIM
Diagnostic Trouble Codes (DTCs) P0171 bank 1 (Cylinder 1) and DTC P0174 bank 2 indicate the fuel/air ratio is too lean. The fuel trim system is at the rich correction limit.

DTC P0172 bank 1 and DTC P0175 bank 2 indicate the fuel/air ratio is too rich. The fuel trim system is at the lean correction limit.

DTCs HO2S Reference list:

HO2S-11 = DTCs P0171 and P0172
HO2S-21 = DTCs P0174 and P0175
Possible causes:

Fuel system

Excessive fuel pressure.
Leaking fuel injector(s).
Leaking fuel pressure regulator.
Low fuel pressure or running out of fuel.
Contaminated fuel injector(s).
Vapor management valve (VMV) leaking.
Induction system

Air leaks after the MAF.
Vacuum leaks (vacuum lines and gaskets).
Restricted air inlet.
PCV system.
Fuel purge system.
Improperly seated engine oil dipstick.
EGR System

leaking gasket.
Stuck open EGR valve.
Leaking diaphragm.
Base engine

Oil overfill.
Cam timing.
Cylinder compression.
Exhaust leaks before or near the HO2S(s).
Check intake air system for leaks, obstructions and damage.
Check air cleaner element, air cleaner housing for blockage.
Verify integrity of the PCV system.
Check for vacuum leaks.
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Old 02-06-2006, 08:25 AM   #8 (permalink)
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what is your fuel mileage?

might help with a possible fuels system leak.

Clean your idle air control valve mounted on top of the intake manifold.

as Paul just said, check for vacuum leaks.
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Old 02-07-2006, 03:01 AM   #9 (permalink)
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When you say 'clean the IAC valve' how can I clean it? My chilton's manual says not to attempt to clean it - but I'm game to try any practical procedure that has been used successfully! Thanks
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Old 02-07-2006, 01:07 PM   #10 (permalink)
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just remove the two bolts that hold in to the intake manifold, flip it over, and spray some TB cleaner in there. Let it dry and put it back on.
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