Question about 2004 Volvo S40

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Code P2187 i also have a check engine code of P2187 and cant find out what it means. autozone did a print out of posible items. MAF sensor faulty, large vacuum leak, or low fuel pressure. i want to verify.

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  • ricondano Jul 17, 2009

    IS THAT THE AIRFILTER?

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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.

Posted on Jul 17, 2009

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P0174 This check engine code came on what does it


Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 2 is generally the side of the engine that doesn't have cylinder #1
A code P0174 may mean that one or more of the following has happened:
  • The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can 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.
  • Inspect all vacuum and PCV hoses, replace if necessary
  • Check for a dirty fuel filter and proper fuel pressure
  • sometimes just cleaning the MAF sensor is enough to fix

Sep 14, 2014 | Cars & Trucks

2 Answers

How do I fix po172 on 05 elantra?


That code is for too rich of a fuel mixture. Replacing the MAF was a shot in the dark. You first need to check for vacuum leaks on all the hoses and intake. If you don't find any, then you need to check the injectors.

Jul 18, 2014 | 2005 Hyundai Elantra

1 Answer

P2187, 2006 Mazda6 3.0L


start with the cheapest fix first. Locate the vacuum leak first because it can cause other codes to pop up.

May 04, 2014 | 2006 Mazda 6

1 Answer

P2187 code on 2006 sonata v6


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P2187 System Too Lean at Idle (Bank 1) DTC
OBD-II Trouble Code Technical Description
Article byDon BowmanASE Certified Automotive TechSystem Too Lean at Idle (Bank 1)
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model.
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This is an ambiguous code in of itself. It can be a tough code to crack without a diagnostic strategy. During the last two starts, the engine management computer has recognized a problem with the fuel mixture at an idle.
It appears that the fuel mixture is too lean (too much air and not enough fuel) at an idle. If you have a 4 cylinder engine the "Bank 1" is meaningless, however, if you have a 6 or 8 cylinder engine, Bank 1 will be on the side with the number one cylinder. Code P2189 is the same code but for Bank #2.
There is a laundry list of components that could cause this scenario. For the most part the diagnostic procedure is not difficult -- just time consuming, unless it is one of the first items checked. The strategy dictates that the driveability problems are observed and noted, then start with the most commonly found problems and progress from there.
Symptoms
With the wide range of possibilities, the problems listed may and may not be present. But, here is where it is important to pay particular attention to the symptoms observed and make a note as to what and when symptoms appear for diagnostic strategy.
Vehicle has a miss at an idle
Hard to start, especially when hot
Very irregular idle
Additional codes to pinpoint cause of original P2187 code
Whistling noises
Lower turbo boost numbers
Fuel smell
Potential Causes of P2187 DTC
Faulty O2 sensor (front)
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
Diagnostic / Repair Steps
Your strategy for locating this problem begins with a test drive and observation of any symptoms. The next step is to use a code scanner (available at any auto parts store) and pulling any additional codes.
The computer has set a code P2187 stating that the fuel mixture is lean at an idle. This is the main code, however, any component malfunctioning within this loop that has the potential to cause a lean mixture will also be set in code.
If the test drive doesn't produce any symptoms it is possible that it is not a real code. In other words, the fuel mixture is not lean and that the computer or oxygen sensor is responsible for setting the code.
Every vehicle has a minimum of two oxygen sensors -- one in front of the catalytic converter and one after the converter. These sensors signal the amount of free oxygen left in the exhaust after ignition, which determines the fuel ratio. The front sensor is primarily responsible for the mixture, the second sensor behind the exhaust is used for comparison to the front sensor to determine if the converter is working properly.
If a rough idle is present or one of the other symptoms, begin the process with the most likely cause first. Either unmetered air is entering the intake manifold or there is a lack of fuel pressure:
Check the fuel cap for cracks and sealing and function
Lift the hood and make sure the oil filler cap is tight
If additional codes were present begin with inspecting them first
Look for air leaks starting at the mass airflow sensor. Check the hose or connection between the sensor and the intake manifold all the way to the manifold for cracks or loose connections. Check all vacuum hoses carefully attached to the intake manifold, to include the one to the vacuum brake booster. Check the hose to the MAP sensor and all hoses to the turbo if so equipped.
With the engine running, using a can of carburetor cleaner and spray a small mist around the base of the intake manifold and where the two halves meet if it is a two piece. Spray around the base of the EGR for leaks into the manifold. The rpm will increase if a leak is located.
Check the PCV valve and hose for leaks.
Inspect the fuel injectors for external fuel leaks
Inspect the fuel pressure regulator by pulling off the vacuum hose and shaking it to see if fuel is present. If so replace it.
Shut the engine down and install a fuel pressure tester on the schrader valve on the fuel supply rail to the injectors. Start the engine and note the fuel pressure at an idle and once again at 2500 rpm. Compare these figures with the desired fuel pressure found online for your vehicle. If out of range in volume or pressure replace the pump or filter.
The remainder of components need to be inspected by a service facility that has a Tech 2 scanner and programmer.
Register now to ask a question (free)
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The light goes off for a day or so after resetting, but comes back on.
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Apr 05, 2014 | 2002 Ford Windstar Cargo

1 Answer

Check engine light is on and the code is P2187 which states system too lean at idle - Bank 1


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

Jul 13, 2011 | Mazda MAZDA6 Cars & Trucks

1 Answer

My check engine light is on and i was told it's code po102. What does that code mean is the reason the light is on?


A code P0102 may mean that one or more of the following has happened:

  • The MAF may be disconnected, or a wiring connection may be bad
  • The MAF may be dirty or otherwise contaminated (Note: if you use a reusable oiled air filter, be careful not to apply too much oil or that can contaminate the MAF).
  • The MAF sensor may be faulty
  • The vehicle computer may be faulty (very rare)
You most likely will need to replace the car's Mass Air Flow (MAF) sensor. It measures how much air is entering the engine. They usually cost ~$100 for the part

Feb 28, 2011 | Kia Sephia Cars & Trucks

1 Answer

2006 Optima - engine code p2187-how to correct -


Take the car to a place like Autozone, Kragen, O'reilly auto parts etc. They will hook up their hand held analyzer to your car, read the code, and then give you a print out of what it is. All for free, probably a oxygen sensor or some type of sensor. take care.

Feb 28, 2011 | 2006 Kia Optima

1 Answer

Check engine light is on..its chevy hhr,ss.is anybody can help please .and there was a code p2187


P2187-Fuel Trim System Lean at Idle--
If you have a cold air intake on your 2009 HHR turbo, it been know to happen. Your HHR is still under warranty so take it to the dealer, the code indicates that the engine is running lean when at idle but is running fine what engine is under load. It could be a simple update to the soft wear to the ECM to the HHR or a faulty MAF, regardless use the warranty you have and have them get your HHR running 100% again.
Thank you for using Fixya.

Mar 18, 2010 | 2009 Chevrolet HHR

1 Answer

My check engine light came on. the code was po102. i have a 2000 vw beetle. any idea what this means? Thanks!



Trouble Code: P0102


MAF Sensor Circuit Low Input
Possible Causes:



Check for leaks between MAF sensor and throttle valve control module Voltage supply faulty. Sensor power circuit open from fuel pump relay to MAF sensor Sensor signal circuit open (may be disconnected) from ECM and MAF Faulty ground cable resistance between connector terminal 1 and Ground MAF Sensor malfunction Sure hope this helped you and good luck.

Jul 20, 2009 | 2000 Volkswagen Beetle

6 Answers

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


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.

Aug 12, 2008 | 2003 Mazda Mazda6

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