Question about 2003 Mazda Mazda6

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CHECK ENGINE CODE P2187 SAYS SYSTEM TOO LEAN AT IDLE BANK 1

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  • Anonymous Oct 02, 2008

    I was told vaccum leak

  • traderwep Dec 21, 2008

    I have the same check engine code P2187. I would like to know the simplest possibilities first that maybe I could fix. I am trying a new gas cap. I dont know if premium gas will make any difference but will try it. Can I get the code to reset if I disconnect the neg batt terminal?

  • sherer_aaron Feb 07, 2009

    I have this same problem. I checked around the throttle body to see if it was either of the two vacuum lines referenced above. It was neither on of these. I have heard anything from a simple vacuum leak to a purge valve to a fuel pump. Anyone know where to start first? Like most others I don't have $600 laying around for someone to tell me I have a simple vacuum leak... I have an 05 Mazda 3 / 2.3L with about 70k on the clock. I had the code read and it said there were 4 codes. p2187. p0455, p2187 (again and I don't understand why it read a 2nd time) and p2196. I'm assuming and hopefully optimistic that one is leading to the other codes. Just looking for some simple direction, please!!!!!!

  • Anonymous Mar 18, 2014

    2007 mazda cx7 p2187 system to lean a idle bank 1

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I had the same code, p2187. check to the left of the throttle body(side facing the front of the veh.
there are 2 vaccum hoses going into the intake. the larger one on top has a spring clip holding it and if you look under that you'll see a smaller one with a check valve. mine was disconnected. plugs in under the larger one.

Posted on Feb 07, 2009

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  • Master
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Your most likely cause is a failing primary oxygen sensor (that's the sensor before the catalytic converter) on the number one bank of the engine (whichever bank has cylinder #1 is bank one).

Posted on Aug 12, 2008

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Hi I have the code p0455 and p2187 coming up i had the pc valve and gaskets replaced. When I put gas In my car It hesitates to start and i have to push down on gas to keep car from shutting off and this only happens when I put gas in car. I put new gas cap on that I bought from mazda.

Posted on Apr 16, 2010

  • ebrods Nov 22, 2010

    I have the same issue with my 2004 Mazda 3. Did you ever find a solution? I have have 3 diagnostic checks and they still find nothing.

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Happend to me on my mazda 6 and the mechanic said is was the cold air intake and he shut it off. He said its not harming the car but the car knows its not the stock intake and all o2 sensors are fine.

Posted on Feb 17, 2009

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Have a mazda 3...codes po455 and p2187...please help

Posted on Mar 29, 2010

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  • Mazda Master
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  • Faulty gas cap seal
  • Leaky or loose oil filler cap
  • Air leaking into the intake manifold downstream from the Mass Airflow sensor due to the manifold itself, vacuum hoses off or cracked, leak MAP sensor, Leak at turbo bypass or it's stuck open, power brake booster hose, or a leak in the EVAP system hoses.
  • Faulty MAP sensor
  • EVAP canister purge valve
  • Fuel injector leak
  • Fuel pressure regulator faulty
  • Leaks in the exhaust system
  • Faulty variable camshaft timing
  • Faulty ECM (engine management computer)
  • Faulty O2 preheater (front)
  • Clogged fuel filter
  • Fuel pump wearing out and producing low pressure.
  • Faulty mass air flow sensor
  • faulty O2 sensor

Posted on Jan 05, 2015

1 Suggested Answer

canwoodjc
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SOURCE: Check engine light is on

The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" Air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry

There could be a vacuum leak downstream of the MAF sensor

In the vast majority of cases, simply cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling

Inspect all vacuum and PCV hoses, replace if necessary

Check for a dirty fuel filter and proper fuel pressure

Posted on Jul 13, 2011

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Hi, I have a VW EOS 2007, check eng light on, 008583 - Bank 1; System too Lean at Idle P2187 - 004 - - MIL ON, then, 004369 - Oxygen (Lambda) Sensor Regulation: Bank 1


The O2 sensor is most likely the issue. Also, try cleaning the Throttle Body Injector with cauberator cleaner or tbi injector. Build up within the TBI may be causing a gas deficiency which causes it to run lean. If that doesn't help, try running a higher octane fuel, about 93 octane minimum. This will causes ANY debree in the injectors to be cleared.

Feb 23, 2014 | 2007 Volkswagen Eos 2.0

1 Answer

Problem code p2187


code p2187 refers to system too lean bank 1==causes -- fuel pressure--injectors--intake leak---ECM It also refers to adaptive heated oxygen sensor (HO2S) control bank 1 no signal===causes --wiring ---HO2s---ECM Have a pressure test done on the fuel manifold to check fuel pressure ,regulator and filters.. Check for vacuum leaks in the manifold including all hoses.. Replace the oxygen sensor.

Oct 12, 2013 | Cars & Trucks

1 Answer

Code P2187


code p2187 refers to system too lean at idle bank 1==causes -fuel pressure--injectors--intake leak
It also refers to adaptive heated oxygen sensor (HO2S) control bank 1- no signal==causes--wiring--HO2S--ECM. Have a pressure test done on the fuel manifold to check for pump/regulator filter problems and check the wiring for the oxygen sensor or the sensor itself.

Sep 06, 2013 | 2007 Porsche Cayman Coupe

1 Answer

Code p2187 and engine light on


according to the data book code p2187 is "System too lean at idle, bank 1" and the probable cause is "fuel pressure, injectors, intake leak". hope that helps

Apr 27, 2013 | 2006 Kia Carnival 2.9

1 Answer

2007 Hyundai Entourage codes P2187, PP0174,P2189,P2195,P2270,P2272


I've come across these codes before. In almost every case there was an air leak in the intake air hose (hose between the engine air filter & the throttle body). Inspect this hose & tubes attached to it. This is especially true when the lean code includes the comment 'at idle'
P2187 - System too lean at idle Bank 1
P0174 - System too lean Bank 2
P2189 - System too lean at idle Bank 2
P2195 = HO2S Signal Biased/Stuck Lean (Bank 1 Sensor 1)
P2270 = HO2S Signal Stuck Lean (Bank 1 Sensor 2)
P2272 = HO2S Signal Stuck Lean (Bank 2 Sensor 2)

P2187 & P2189 = In order to provide the best possible combination of drivability, fuel economy and emission control, the PCM uses a closed loop air/fuel metering system. The PCM monitors the HO2S signal voltage and adjusts fuel delivery based in closed loop fuel control. Changes in fuel delivery will be indicated by the long-term and the short-term fuel trim values. The ideal fuel trim value is around 0%. The PCM will add fuel when the HO2S signal is indicating a lean condition. Additional fuel is indicated by fuel trim values that are above 0%. The PCM will reduce fuel when the HO2S signal is indicating a rich condition. Reduction in fuel is indicated by fuel trim values that are below 0%. The DTC relevant to fuel trim will be set when the amount reaches excessive levels because of a lean or rich condition

Aug 31, 2011 | 2008 Hyundai Entourage

1 Answer

2006 Mazda codes P0455 P2198 P2189 P2187 P2196. Dont know where to start looking for problem. Bought a new gas cap. Trouble starting after I fill the tank but after I get it started the first time no...


P0455 Evaporative Emission Control System Leak Detected (large leak) P2198 O2 Sensor Signal Stuck Rich (Bank 2 Sensor 1) P2189 System Too Lean at Idle (Bank 2) P2187 System Too Lean at Idle (Bank 1) P2196 O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) basically you need to replace either the air /fuel ratio sensor,, or,,the heater relay associated with that sensor,, these are very hard to diagnose without the hand held or scope that narrows it down ,, you can check a multitude of voltages on a number of electrical connections, as far as the P0455 ,, if you installed a new gas cap either have the code removed , or wait a couple of days and it should remove itself, as long as the cap is factory approved, Look for vacuum leaks in the evap system , cut hoses,, bad connections,

Aug 22, 2011 | 2003 Mazda Mazda6

2 Answers

P2197 p2187 p2177 p2195 p2179 p2189


P2197 - Oxygen Sensor Signal Biased/Stuck Lean Bank 2 Sensor 1
P2187 - System Too Lean At Idle Bank 1
P2177 - System Too Lean Off Idle Bank 1
P2195 - Oxygen Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1
P2179 - System Too Lean Off Idle Bank 2

I am not sure what your Mazda is, but from the sounds of it, both of your Oxygen Sensors are shot. Replace them both, or check for vacuum leaks. It may be a good time to inspect and replace the PCV Valve and PCV Valve hose, too.

Mar 12, 2011 | Mazda MAZDA6 Cars & Trucks

1 Answer

Engine code P2187 pops up. Also had miss in cyl 1 but resolved by changing long overdue plugs. Now P2187 comes on again (Lien at idle) Any suggestions before I bring it in. Vehicle has 145K miles. Runs...


P2187 = "system too lean at idle, bank 1"

The problem is in the bank of cylinders that includes cylinder 1. Running too lean at idle can often be caused by an air leak between the mass air flow sensor and the throttle body, a leaky intake manifold gasket, or some other vacuum leak. "False air" is downstream of the MAF sensor so it is not measured. The computer only attempts to add the correct amount of fuel to air that it knows about. It will attempt to compensate for lean mixtures but at a certain point, it will turn on the check engine light.

The miss that you had on cylinder one was caused by two things; the false air leaning out the mixture and a worn plug. You replaced the plug and now that new spark plug is able to fire the lean mixture. But the false air remains to be corrected. Eventually, you'll have misfiring again.

Feb 25, 2011 | 2006 Kia Optima

1 Answer

2007 entourage code p2187 p2189 p0171 p0174 keeps coming on cleaned mass air flow sensor with crc cleaner dont see any vacuum leaks ????help?


Here is two of your codes. Lean mixture on banks 1 and 2. There are 37 pages of Hyundai codes.

http://www.autocodes.com/p0171_hyundai.html

P0174 HYUNDAI - System Too Lean Bank 2

Read more: http://www.autocodes.com/p0174_hyundai.html#ixzz43IA8HGCb

P2187 HYUNDAI - System Too Lean At Idle Bank 1. P2189 will be Bank 2 at idle.

Read more: http://www.autocodes.com/p2187_hyundai.html#ixzz43IASlusU

Check all the bolts holding the plenum, and anything else concerned with air intake. Too much air means weak mixture.

Feb 05, 2011 | 2008 Hyundai Entourage

1 Answer

Code P2187


P2187 System Too Lean at Idle (Bank 1)

Check the MAF. this could be the reason for the O2 reading lean. if the MAF is ok and, the sensor is not damaged, replace the Os sensors.

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