Question about 2003 Mitsubishi Diamante

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I have four codes, p0171, p0174, p0134, p0154, my car is mitsubishi diamante 2003, it run rough when I waiting the red light. I am crazy, who can help me, What is the problem? Thank you very much!

Posted by Yongzhi Wang on


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Erdene Onon

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My car is toyota vitz 2008. I have six codes P0102, P0113, P0171, P0172, P1603, P1605. Who can help me, what is the problem?Thank you very much.

Posted on Apr 20, 2016


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  • 365 Answers
  • yongzhi Wang Aug 28, 2013

    what should I do? should I replace O2 sensor or check deeply? Thanks!

  • Yongzhi Wang Aug 31, 2013

    I replaced the oxygen sensor, but the situation have not been changed.



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SOURCE: 1997 mitsubishi diamante stereo code

need a radio code for a 1997 mitsubishi diamante

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SOURCE: SRS light came on in 99 Mitsubishi Diamante

Yes there is a problem with your airbag system. Take it in asap

Posted on Mar 13, 2009


Bill Buchsbaum

  • 2761 Answers

SOURCE: 2003 mitsubishi diamante thermostat

You're going to lose some coolant, so have a bucket or other container ready. Follow the upper radiator hose to the point where it's connected to the engine. The hose is clamped to a metal housing which is bolted to the engine. Remove the bolts (not the hose) and lift the housing to expose the thermostat (may require a little prying with a screwdriver or similar tool). Note how the old thermostat is fitted (which end is up), lift it out of the engine, and then remove all traces of gasket from the housing and the engine. Install the new thermostat and gasket, replace the bolts, add coolant as necessary, and you're done.

Posted on Jan 04, 2010


  • 3 Answers

SOURCE: Location of fuel pump on 2003 mitsubishi diamante?

bs it is in the back under the seat dont comment if you dont know
remove four screws pop plate off and there it is it took me 25 mins to change fuel pump beat that

Posted on Jan 19, 2010


  • 976 Answers

SOURCE: P0442 code-2004 mitsubishi diamante

its an evap system small leak. most common cause is a loose gas cap. but could be any leak in the tank vent system

Posted on Apr 21, 2010

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Im getting P0171 code- lean .

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Jan 27, 2016 | Cars & Trucks

1 Answer

2003 Chevrolet Impala ls 3.8l. "Hello, I have an

P0171 and P0174 are lean codes. There is likely a large vacuum leak or the MAF is bad.

Try starting the car and wiggling the connector for the MAF sensor. Also try tapping the MAF sensor. If the idle changes or the car stalls replace the MAF sensor.

The second shop should recognize that these codes don't have anything to do with the ignition module.

I’m happy to assist further over the phone at

Apr 04, 2013 | Cars & Trucks

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Mitsubishi montero p0171 p0174

The P0171 means System too Lean (Bank 1)
the P0174 means System too Lean (Bank 2)
om580 obd2 scanner

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My 1999 Sonoma with the 4.3 is having power/acceleration problems. I get four fault codes that will flag my check engine light on occasion they are, P0171, P0174, P0151, and P0154. I have changed the...

probably changed the wrong sensors
The units you should have replaced are the heated oxygen sensors in the exhaust manifold before the cat converters (HO2S)
oxygen sensors(O2S ) are after the cat converters codes p 0171,0174 are lean mixture codes and p 150,p0154 are HO2S sensor faults
as the Ho2s sensors read the composition of the exhaust gas and report to the ECM to adjust the fuel settings then t faulty HO2S sensors will result in a lean or rich reading resulting in the other codes

Jan 28, 2018 | 1999 GMC Sonoma

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2003 Ford Expd. running rough @ idle -

There could be many issues. These codes read your engine is running too lean. Check : all your vacuum hoses for leaks, PCV valve and hose, MAF sensor. This may require an experienced technician to figure this out. Hopefully I help'd!!

Apr 05, 2010 | 2003 Ford Expedition

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Your sensors are reading correctly so leave them alone. What you have is a fuel delivery issue. Your MAF sensor is telling your engine to lean your fuel mixture. You need to remove and clean or replace (is better) the MAF. But first replace your PVC valve and clean your ERG valve.

Jan 20, 2010 | 2000 Dodge Intrepid

1 Answer

02 sensors

they sell two types on o2 sensors one is a generic and the other is OEM always on mopar! use OEM!! not aftermarket once you replace them run engine for 5 minutes ! shut it down then remove battery ground cable for 5 minutes run engine again and recheck codes

Jan 17, 2010 | 2000 Dodge Intrepid

2 Answers

1996 GMC Sierra 1500 P0174, P0171,P0154, AND P0122


Yes these codes are associated with the MAF Sensor. One can trip the others as well. I would try removing the MAF Sensor and cleaning it first (brake cleaner or contact cleaner), then if that doesnt work I'd chalk up the bucks for a new sensor. Check this link for additional info on this



Nov 15, 2008 | 1996 GMC Sierra

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