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Po 171-174 - 2000 GMC Sierra

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Lean banks 1 & 2. Most likely a vacuum leak, but could be a dirty or bad MAF sensor, clogged injector(s), bad O2s(although I doubt 2 go bad at the same time), etc.
Those are always fun to diagnose. I would focus on the vacuum hoses and try cleaning the MAF elements with CRC MAF cleaner or electrical contact cleaner.

Posted on Oct 20, 2013

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Fault codes PO 193 FRP -- PO 101 MAF -- PO 380 -- PO a 09dc/dc -- PO 238 TURBO/ super charger-- PO 118 ECT -- PO 283 fuel temp sensor -- U 2023 brake sensor


101,380 and 118. These together is a no start. Take it to a garage. Just a guess, but I would be looking into the wiring. You waited to long to have a problem fixed. One bad part over time will lead to many codes. The PCM is trying to adjust to make the engine run right. Throwing other sensor out of range. Out of range pops a code.

Aug 06, 2016 | Ford Cars & Trucks

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What could PO 302, PO 300, PO 105, PO106, PO 110,PO 115& PO 120 CODES Mean on a Toyota Camry 2000 model sedan car?


what engine, what size. that is first question.
misfire, map ,maf, iat, ect,tps and cat fail and low coolant temps.
very odd mix there. did you pull connections, key on???????

it means they all fail a test.
DIY? or just curious?

login to alldata.com
the question is , which is the most important.
all are cept 420, (last that, and bet goes way. later.)

reset the ECU, and see which come back.?
check all fuses.
then post codes that repeat, after fuse checks.

does the engine get fully hot running, 180F minimum?

Nov 27, 2013 | 2000 Toyota Camry

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2000 Honda Accord po-7*** errors


You can't fix these types of complex electronic engine control problems without special equipment.

Jun 12, 2013 | Honda Accord Cars & Trucks

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Code number for o2 sensor voltage low


Forget to write it down?

Generic or Manufacturer?

There are 41 Generic O2 Codes

PO 131--bank 1 sensor 1
PO 137--bank1 sensor 2
PO 143--bank1 sensor 3
PO 151--bank2 sensor 1
PO 157--bank1 sensor2
PO 163--bank2 sensor 3

Nov 23, 2012 | 2009 Toyota RAV4

1 Answer

What's your problem? my 2004 mercury monterey has eight codes ,po301,poo53,po106,po316,po300,po304,po305,and po306


PO 300 is multiple misfires detected
PO 301, 304, 305, 306 are misfires in cylinders 1,4,5,&6
PO 053 is HO2S Bank 1 Sensor 1 Heater Resistance
PO 106 is MAP/BARO CKT Range / Perf
PO 316 is Misfire detected 1st 1000 Revs.

On a misfire, I usually push towards the spark plugs, plug wires, and coil packs / distributor coil.
You have PO 106 and PO 053 that need to be inquired about at nearest AutoZone.
They can give you an idea as to what is the problem on these.

Did a MAP sensor **** out and cause all the misfires ?
Did a misfire cause the MAP sensor error?
You see what I'm saying ?...Something caused all the misfires...thinking MAP...but not that familiar with the function of the MAP.

Hope this helps...

Aug 13, 2011 | 2004 Mercury Montery

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What are the automatic transmission problem codes PO 751, PO 761, PO 734 indicate


PO 734 GEAR 4 INCORRECT RATIO
PO 751 SHIFT SOLENOID A PERF OR STUCK OFF
PO 761 SHIFT SOLENOID C PERF OR STUCK OFF

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2 Answers

Error codes po 134 po 153 po 154 po 155 po 171 po 174


PO 134 = 02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR1)
PO 153 =02 SENSOR CIRCUIT SLOW RESPONSE (BANK 2 SENSOR 1)
PO 154 =02 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 2 SENSOR 1)
PO 155= 02 SENSOR HEATER CIRCUIT MALFUNCTION (BANK 2 SENSOR 1)
PO 171= SYSTEM TOO LEAN (BANK 1)
PO 174= SYSTEM TOO LEAN (BANK 2)
I WOULD SAY YOU HAVE FAULTY OXYGEN SENSORS CAUSING THE ENGINE TO RUN TOO LEAN REPLACE THEM AND YOU SHOULD BE BACK IN BUISNESS

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1 Answer

MY CAR WAS PUT ON A MACHINE AND IT CAME BAC THE FOLLOWING CODES: PO 301, PO304, PO335, AND PO 750. I DONT KNOW WHAT TO DO MY MECHANIC SAYS THAT THE SHIFT SOLENOID IS LOCATED IN MY TRANSMISSION AND HE...


hi p -codes are as follows po 301 cylinder 1 missfire detected
po 304 cylinder 4 missfire detected
po 335 crankshaft position sensor A circuit malfunctio
po 750 shift solenoid A malfunction

Feb 23, 2011 | Hyundai Sonata Cars & Trucks

1 Answer

Check engine light is on,codes 171,174,system lean,codes came back as 2 oxygen sensor's before cat/conv,do they need to be replaced or could it be something else causing it, any help would be great!!!


O2 SENSORS ARE BAD MOST LIKELY I WOULD CHANGE THEM DISCONNECT THE BATTERY FOR 5 MIN. ( IF YOU DONT HAVE A SCANNER) THIS WILL RESET YOUR COMPUTER AND SHOULD MAKE THE SERVICE ENGINE LIGHT GO OUT.

May 19, 2009 | 1999 Ford Ranger SuperCab

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