Question about 2003 Chevrolet Cavalier

1 Answer

Po171 The check engine light came on some time ago. I hooked up the diagnostic and it came up po171. I have since changed the fuel filter and ran some injector cleaner through it. I have also pulled the plugs and made sure they weren't fouled (the plugs are less than a year old). The light is still on and I now have hesitation when i step on the accelerator. It does seem to get better the longer i drive it though.???

Posted by on

  • Nicholas Homuth Jul 18, 2013

    i have changed the upstream o2 sensor and yes i googles the code and it is bank 1 is running too lean. I also have a list of all the things it could be and am starting with the simplest first.

×

1 Answer

So all your saying is you never Googled the
OBD Code PO171 & have no idea what it is
or what to do
The fuel filter has no ties to any sensor & you change
it every 3 or 4 years
Any product you buy like injector cleaner is a waste,
16 oz in a 18 gallon tank of fuel. Ask yourself Diluted
like that, what would that do,ever see that recommended
buy any manufacture,nope
How about studying OBD Systems & get up to speed
What about the 171 code & changing front oxygen sensors
every 100,000 miles or component test yours,check for vacuum
leaks,smoke test the intake,check fuel trim,do something to actually find out why you have a fault code
Why has any time passed since the MIL lamp came on?
You diagnose all check light issues the next day, with any
vehicle problem,only been 30 years or more since we got
check lights on all vehicles

Posted on Jul 18, 2013

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2003 Ford Expedition check engine light on .Codes PO171 & PO174


This is a tough one could be mass air flow sensor ,oxyegen sensors,a fuel filter. a vacum leak, a pcv valve if i missed anything just google po 171 &174 look for fix ya this issue has been addressed many times first check the vacum lines includeing the line on the pcv valve for cracks or splits in the lines .I would do the fuel filter if it hasnt been changed in the last couple of years , if still a problem the MAF sensor if your happy with my advise please leave me with great feedback

Feb 18, 2013 | 2003 Ford Expedition

1 Answer

Fuel


Injectors may not be receiving signal to open, have you had your ECU Hooked up to diagnostics and checked the injector signal plugs?


(you will need a set of injector test lights, these can be had in a kit for around 40 bucks on ebay, as for diagnostics you may need to take it to a ford dealership or service center if you don't have a diagnostic tool)

Oct 20, 2012 | 2001 Ford Mustang

1 Answer

1998 FORD CONTOUR CHECK ENGINE CODES P1131 AND PO171. REPLACED 1 OF THE OXYGEN SENSORS, CHANGED PLUGS, PLUG WIRES, OIL AND FILTER, ALSO REPLACED AIR FILTER AND CLEANED PCV FILTER, RESET PC AND IT RAN GOOD...


sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.

Aug 07, 2010 | 1998 Ford Contour

1 Answer

Have this code PO171, what does this mean.


Not sure that the O2 sensor was bad. It sounds like it was telling you that side of the exhaust system was picking up a lean mixure at the O2 sensor. The O2 sensor was doing its job by telling you the mixture changed. If the O2 sensor was bad, it would say low voltage range for that sensor, or open curcuit.
Now the car has had time to do its diagnostic sweep, it is telling you the same thing, but from a different sensor...the fuel mix is too lean. Air/spark/and fuel is what you need in the correct amounts. In your car, the ECM engine control module controls this by taking readings from all the sensors several hundred times a second.
Mechanically, you have a few options. Change the fuel filter...under the car on the passenger side. It is an easy job.
Change the fuel pressure regulator. This keeps the fuel at 4 BAR so the fuel injectors can do their job correctly. This job just needs a screw driver to pop off the clip that holds it in place. No hoses need to be removed. It is on top of the intake manifold, in-line with a metal fuel line and a rubber one.
The fuel injectors could be clogged up on one side of the engine. Run some fuel injector cleaner through a tank of gas. Also, listen for a constant ticking sound at each injector. If one sounds off PAR, then replace it.
The fuel pump may not be giving you enough power. However, the readings seem to be localized to one side, so I doubt it.
Start with the easiest thing, and see if it works. Also, you will need to get yourself a VAG scan tool. It is the only one with codes in it for all of your VW systems, not just engine codes like the ODB scanners. You can get a nice one for $50 on-line.
Good Luck!

Feb 24, 2010 | 2002 Volkswagen Passat

1 Answer

I have a 2002 caravan 3.3L engine light came on but was running fine. code Po171 (system too lean bank 1) no other codes. ran fine several days with engine light on . 3rd morning it wouldn't start. started...


the most propable cause is you have a vacume leak. Check all intake hoses for leaks and spray brake cleaner around intake gaskets if rpms change then you found a leak also clean your mass airflow sensor

Feb 04, 2010 | 2003 Dodge Caravan

2 Answers

Acting as if it will stall in idle, changed fuel filter, plugs and wires, recently had oil change. Ran good for a few days and now doing the same thing is was before I started. In the begining I had and...


You should check for ignition coil test,it has a coil pack of three doble post,so you can replace one of those packs,in ford its a common fault,GL

Nov 25, 2009 | 2001 Ford Taurus

1 Answer

DIAGNOSTIC CODES


Here are the possible causes for the PO171 and PO174 codes:


  • Base engine mechanical problem affecting one or more cylinders
  • Check for air leaks after the MAF sensor
  • Check for air leaks in the Air Induction system (e.g., in the intake manifold)
  • Check for air leaks in the EGR system and in its related hoses and/or valve
  • Check for air leaks in the PCV system and in its related hoses and/or valve
  • Fuel control sensor is out of calibration (e.g., ECT, IAT or MAP)
  • Fuel delivery system supplying too little fuel during cruise or idle periods (e.g., faulty fuel pump or dirty, restricted fuel filter)
  • Fuel injector (one or more) dirty or pressure regulator has failed
  • HO2S has failed (it may be contaminated with fuel, silicone or water)
  • Vehicle driven low on fuel or until it ran completely out of fuel

Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!

Mar 20, 2009 | 2004 Suzuki Verona

1 Answer

Delay in shifting when excelerating


throttle position sensor, but check fuel filter first

Jan 03, 2009 | 2004 Chevrolet Tahoe

1 Answer

Codes P0171 and P0316


code po316 is a random misfire like plugs or wires po171 will cause po316 po171 is a lean o2 code on bank # 1 that is a vacuum leak need to check it better for a vac leak

Dec 14, 2008 | 2003 Ford Windstar

Not finding what you are looking for?
2003 Chevrolet Cavalier Logo

135 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8215 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...