Question about 1997 Chevrolet Blazer

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Po171 chevy blazer - 1997 Chevrolet Blazer

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P0171 MEANS FUEL TRIM SYSTEM IS RUNNING BANK #1 THATS DRIVERS SIDE OF ENGINE IT IS LIKELY THE FIRST OXYGEN SENSOR ONE THAT SIDE IN THE Y PIPE

Posted on Nov 07, 2010

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Posted on Jan 02, 2017

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I have a 2000 chevy blazer 4.3 that has a po171 code. I'm going to clean the MAF. Would this code also be a bad MAP


Check for vacuum leaks or low fuel pressure. A failing MAP will usually make it run rich.

Jan 09, 2014 | Chevrolet Cars & Trucks

1 Answer

What do these trouble codes mean p0171 and p0174


po171 is system too lean,bank 1,po174,is system too lean,bank 2,It sounds like a fuel pressure problem.

Jan 05, 2010 | 2000 Chevrolet Blazer

4 Answers

Po171 system too lean bank 1 this code came up..the light on the dash is yellow and comes on then goes off. I put fuel injector cleaner in it just in case..but what does this mean??


this sounds like you have a vacuum leak. what this is telling you is you dont have the right air/fuel mixture ratio and the o2 sensor is picking up the air rich burn. does the engine run rough? it could be a stuck injector. usaully vacuum though. happy holidays

Dec 29, 2009 | 2002 Volkswagen Passat

1 Answer

Po128,po155,po171,po300 These are the things that faile on my 2002 chevy blazer when I took it to the Maryland state emmissions test. Do you know what they are?


P0128 (Coolant thermostat-coolant temp below thermostat regulating temperature) Possible cause-Mechanical fault

P0155 (Heated oxygen sensor (H)2S)1, bank 2,-circuit malfunction) Possible cause Wiring, H02S, ECM

P0171 (System to lean, ban 1) possible cause intake blocked, EVAP canister purge valve, fuel pressure, EGR system, injector(s), H02S

P0300 (Random/multiple cylinder(s)-misfire detected) Possible causes Spark plug(s), HT lead(s), injector(s), ignition coil(s), low compression, or wiring.

Sep 05, 2009 | 2002 Chevrolet Blazer

2 Answers

Flat at acceleration, wont idle


Check the fuel filter to make sure it is not pluged up, also check fuel presure, if its ok you possibly have a pluged cat. converter.

Nov 26, 2008 | 1990 Chevrolet S-10 Blazer

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