Question about 1995 Mercury Cougar

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My 95 cougar(beast)as i call it.will not pass smog.had codes tested and it comes up as (code)0173&0174,bank 1&2?please help?

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You sure it's bank 1 and 2 ? they are both for bank 2. either way it's a fuel problem. not getting enough of it.. here's a link to some info but before you even look over this i'd check your MAF sensor and your o2 sensors maybe fuel pump and fuel filter.. this article has a couple pointers.

If you take care of one the other should be corrected too.
http://www.aa1car.com/library/ford_lean_codes.htm

Posted on Nov 13, 2009

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1995 Ford F150 codes 111,132 what they mean


P1131 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Lean - Bank No. 1

P1132 Lack of Upstream Heated Oxygen Sensor Switch - Sensor Indicates Rich - Bank No. 1

http://www.obd-codes.com/trouble_codes/ford/

Understanding Trouble Codes 111, 211, 172 Hey everyone,

recently pulled some trouble codes from my ECU, the KOEO code gives me 111, which the book says is a system pass, so I am assuming thats not a bad thing. I further went on to get the stored codes which are as follows (I get the same codes while doing a running test as well).


Understanding Trouble Codes 111 211 172 Ford F150 Forum Community of Ford...

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My 2003 kia sedona won't pass emissions the codes are p0320 p0431. Help please


code p 0320 refers to crankshaft position(CKP) sensor /engine speed ( RPM) sensor ---circuit malfunction===causes --wiring---CKP/RPM sensor---ECM
code p 04310 refers to warm up catalytic converter, bank 2--efficiency below threshold===causes ---cat converter---wiring---HO2S 2
As it is not passing the smog test I would be replacing the HO2S sensor ( manifold or before the cat on bank 2 of the engine ) or more likely a failed cat converter
you may have had the P 0320 code for a long time and have not noticed a drop in performance but as cat converters have a lot to do with smog control , that is the area I would advise checking first

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1 Answer

I have the codes are po171 ..po174


code p 0171 refers to system too lean bank 1===causes --intake /exhaust leak---air system---MAF/VAF sensor--fuel pressure / pump---injector/ s---HO2S
code p 0172 refers to system too rich, bank 1===causes --intake blocked ---EVAP canister purge valve --fuel pressure --EGR system---injector/s -=-- HO2S
code p 0173 refers to fuel trim(FT) bank 2--malfunction===causes --intake leak---air system--fuel pressure /pump---injector/s --EVAP canister purge valve---HO2S
code p 0174 refers to system too lean, bank 2===causes intake / exhaust leak---fuel pressure /pump---injector/s---Air system---hose connection/s
I was not sure if you wanted all codes or just the first and last, however you will see that there are some common problems that may help point you in the right direction
1-- is the heated oxygen sensor (HO2S) which is the sensor before the cat converter
2--is the fuel pressure , so a fuel pressure test will determine if a regulator or fuel pump problem,
3--EVAP canister purge valve --replace as required
4--intake / exhaust leak --check for vacuum hose failure including hoses to vent controls and check the flexible exhaust connection before the cat converter for leaks
The rest are there to check if you haven't fix the fault before you get to them

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1 Answer

What does code p0785 mean for 1999 gmc yukon 4x4


Your code is a PO785 is a SHIFT TIMING SOLENOID BANK A wich is a transmission code nothing to do with your smog failure so go to your local auto store and buy this product it's called guaranteed to pass this will get u buy the bs emissions test for 10 bucks regards Chris

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MY (CEL) HAS BEEN ON FOR 2YRS SHOWING THE SAME DTC'S PO171 & PO174 (LEAN CONDITION BANKS 1 & 2) SINCE MY TRUCK RUNS GREAT I DIDN'T STRESS ABOUT THE CEL AND CODES, UNTIL AUG OF THIS YR WHEN I HAD TO HAVE A...


I bought a code reader and use it to cancel codes (When check light is on it puts the engine in a safe mode , affecting MPG ) I drive 600+ miles a month and the codes only throw 2 or 3 times , I have become good at canceling them on the fly with no noticeable problems. Just turned 200k and still runing strong

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____________-
Can Clip Renault

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2 Answers

Not passing smog check


bank 1 is pass/side exhaustpipe/converter bank 2 is on the driverside,this car has two converters, so you have 4 oxygen sensors, one before and one after the converter on each side, so bank 1 sensor1 is pass/side before the converter, bank 1 sensor 2 is pass/side after the converter, then bank 2 sensor1 is driverside before the converter, before means starting at motor, then bank 2 sensor 2 is driverside after the converter, heres a diagram to help, i hope this is helpful.a9203dd.jpg33c9cf6.jpg

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1 Answer

Failed Smog Test - 4 codes for 2001 Isuzu Rodeo


Tune it up and replace the 02 sensor that keeps setting the codes bank 2 sensor 1. Have your oil and filter changed right before you go for a retest to. That will clear up 3 codes P0300, 0155 and 0154. You might have to replace the fuel sending unit to get rid of P0463 but if the gauge works OK I'd leave it alone.

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