Question about 1998 Ford Contour

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2006 gmc envoy system too lean bank 1 - 1998 Ford Contour

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: Bank 1 & 2 running lean

The lean condition is caused from the upper intake gaskets and isolation bolts not sealing properly due to time and poor sealing qualities from the factory ther was a service bulliten for this through ford to replace the gaskets,bolts,vaccum line,and lh side valve cover for this concern the oil was getting onto the rubber contaminating it causing a vaccum leak. If you never had the tsb done i would start there, also if there is high milleage on the vehicle i would also clean the maf sensor and resedt kam.

Posted on Dec 04, 2008

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  • 195 Answers

SOURCE: check engine light on

Generally when these codes appear it is due to insufficient fuel pressure. Test your fuel pump to ensure it is within specs. Have you changed your fuel filter?

Posted on Jan 15, 2009

  • 5 Answers

SOURCE: Ford Windstar 1996 Trouble Codes P0171, P0141, P0161, and P0174

Bank one is toward the front of the vehicle. Sounds like the heated oxygen sensors have gone bad. The Oxygen Sensors are located in the exhaust pipe and require a special socket to remove and replace.

Posted on Jan 16, 2009

daves944
  • 1050 Answers

SOURCE: vehicle failed emissions testing

You need to replace the intake upper plenum gaskets. There is two pieces, a top cover with one big silicone o-ring gasket and a lower half with six smaller silicone o-rings for the individual intake ports. You can buy these as a set, just for this job. Start this job by removing the wiper blades, then release all the screws, (including the ones that support the wiper motor), that hold that big black plastic valence at the back of the engine compartment. Pull that out of the way, you will have to pull the windshield washer hose through it, just disconnect it on the engine side, now you have access to the plenum. It's a pretty easy job now to remove and replace both halves, just a bunch of 8mm screws hold it all together. Take notes or digital pics along the way so you can pop it all back together. My only caution would be; when you have it apart, do not drop anything in the intake port! I always stuff kleenex in these while I'm working in case something slips out of my hands. Also, don't over tighten, it's all plastic. If you don't want to do it yourself, a shop should charge about an hour and a half, plus the codes must be reset and the van driven until all the monitors are ready.

Posted on Mar 26, 2009

  • 842 Answers

SOURCE: Generic code PO171 system 2 lean bank 1 generic

This can be caused by a faulty mass air flow sensor

Posted on Jul 09, 2010

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1 Answer

Codes 1133 and 0171 is coming up on my GMC JIMMY 1998


DTC P1133 HO2S Insufficient Switching Bank 1 Sensor 1

DTC P0171 Fuel Trim System Lean Bank 1

You have a bad vacuum leak or a fuel delivery problem on bank ! P1133 HO2S BANK 1 SENSOR 1998 Chevy Lumina 3 1

Mar 17, 2017 | GMC Cars & Trucks

3 Answers

2002 gmc envoy 4.2 liter 6 cyl code reads bank 1 too lean


too lean can be from leaking manifold, vacuum leak, injectors on that bank, low fuel pressure

Aug 02, 2015 | GMC Cars & Trucks

1 Answer

What does it mean when it said to lean bank 1


It means that one side of the engine cylinders are running too lean of a fuel mixture Bank one is the left side of the engine. Put a fuel injector cleaner in the gas tank first. Once it has had time to do its work, test again. If it's still lean, then look at the injectors and the control module for a fix.

May 25, 2014 | 2006 GMC Envoy

1 Answer

Bmw x5 4.4i code p0430


p2187 system too lean bank 1
p2189 system too lean bank 2
p0430 catalyst stem efficiency below threshold bank 2

You have some air leak. Gaskets/broken hoses.

Mar 16, 2014 | 2006 BMW X5 4.4i

1 Answer

What does P0171B and P1133 mean I have a GMC Envoy 2004 please help


P0171 - Bank 1 system too lean.

P1133 - O2S insufficient switching bank 1 sensor 1

Oct 22, 2013 | GMC Envoy XL Cars & Trucks

1 Answer

I'M having a P0171B and a P1133 on my 2004 gmc


P0171 - Bank 1 system too lean.

P1133 - O2S insufficient switching bank 1 sensor 1

go to autozone and have them read your vehicles computer ,,,or take your battery cables off for 10 minutes then put them on and see if it resets itself ...most likely a code misread on your vehicle

Oct 22, 2013 | GMC Cars & Trucks

1 Answer

P0171


system to lean bank 1 . try putting new spark plugs in

Dec 01, 2011 | 2006 GMC Envoy

1 Answer

Diagnostic code p0171 and what needs fixed


Code P0171 indicates a lean condition on bank #1 sensor #1. To fix it you have to identify the reason for the lean condition. These could include resticted fuel filter, weak fuel pump and vacuum leak. The sensor could also be weak. It will take some diagnosing to pin down the exact cause. You'll need a tester that not only reads codes but monitors sensor output.

Apr 17, 2011 | 2005 GMC Envoy Xl

2 Answers

I have a gmc envoy & the trouble codes are p0107,p0130,p0135 & p0171 can you tell me what the problem can be.


P0107 Manifold Absolute Pressure/Barometric Pressure Circuit Low Input

P0130 02 Sensor Circuit Malfunction (Bank I Sensor 1)

P0135 02 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)

P0171 System too Lean (Bank 1)

Check your Manifold Absolute Pressure Sensor, and it might be a good time to install a new Upstream O2 Sensor.

It might also be beneficial to have your fuel pressure checked if the engine is really running Lean, but this may be caused by a faulty O2 sensor.

Jul 19, 2010 | GMC Envoy XL Cars & Trucks

1 Answer

3 codes present on my 2002 Envoy. p0172, p0420, and p0340,


Track the p0340 first camshaft timing is very important and could possibly cayse your other codes,Call your local GMC dealer I think I remember a bulletin about this code.

Aug 21, 2009 | 2004 GMC Envoy

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