P2190 OBD-II Trouble Code: System Too Rich at Idle Bank 2

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P2190 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2190 code

P2190 is a diagnostic trouble code (DTC) for "System Too Rich at Idle Bank 2". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P2190 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P2190 code definition

System Too Rich at Idle Bank 2

What the P2190 code means

This code indicates there is too much fuel in relation to air (air/fuel ratio) in bank 1 at idle only. Bank 1 is the set of cylinders in an engine that does not contain the number one cylinder. The set of cylinders containing the number one cylinder is referred to as bank 1.

What causes the P2190 code?

A variety of failures can cause this condition. Most often it will be a misfire that sends unburned fuel into the exhaust system. The term misfire is a condition where fuel is injected into a cylinder with the expectation that it will be lit by a spark from the ignition system. If the ignition system fails to create a spark at the spark plug, the injected fuel will not burn and will be pushed out of the cylinder into the exhaust. There are numerous parts in the ignition system that can fail and create this condition.

Leaking fuel injectors can create this condition as well, normally to a lesser degree. The nature of fuel injector failures will result in a mild condition indicated by this code, or result in other more apparent drivability symptoms that will be more obvious to the driver. Clogged fuel injectors are common in older vehicles and could set this code but is less likely.

What are the symptoms of the P2190 code?

Since most vehicles do not idle for extended periods of time, it is likely the owner will not experience any symptoms. A more observant owner may notice loss of power, slight hesitation or a rough idle.

This code is often set along with several other codes that will exhibit symptoms. In some circumstances where the use of a vehicle requires extended idling, the problem this code is reporting will likely result in the fouling of the spark plug for the affected cylinder. The result will be a misfire while idling and possible misfires while driving.

How does a mechanic diagnose the P2190 code?

A mechanic should begin by scanning the vehicle for all codes. If there are other codes present that can contribute to this code, they should be addressed first. Once it is determined this code needs to be addressed, the mechanic should check scan data looking for clues to point him in the direction of the problem.

Some clues to look for are:

  • misfire counters
  • fuel trims attempting to limit the amount of fuel injected
  • possible O2 sensor failures

A quick check of all other components the PCM uses to calculate air fuel ratio is necessary.

Common mistakes when diagnosing the P2190 code

A thorough understanding of the various conditions that cause air fuel mixture problems is vitally important for the diagnosis of codes such as this. Several seemingly unrelated systems can create the conditions to set this code. A mechanic needs to be well versed in the operation of all of these systems and their interaction with each other to accurately diagnose this code:

Ignition system:

Fuel injectors:

  • Injector driver in the PCM
  • Poor electrical connection in the injector's electrical connector (common)
  • Damaged wiring

Oxygen sensor:

  • Oxygen sensors are used to monitor and adjust the air fuel mixture. If a problem exists in this monitoring system, it will affect the PCM’s calculations for air fuel ratio. This can lead to all sorts of interesting results.
  • Exhaust leaks. Oxygen sensors are installed in the exhaust system. Exhaust leaks actually suck in oxygen and taint the O2 sensors readings.

Often there are unique problems with specific makes and models. For information such as this, a mechanic will resort to checking TSB’s (Technical Service Bulletins), resources such as IATN (International Automotive Technicians Network or Identifix. All three are good resources where a mechanic can call on the collective experience of other technicians.

How serious is the P2190 code?

If only this code is present, it isn’t usually an immediate problem, but it is an indicator of problems to come. If nothing is done to address this code, more obvious symptoms will eventually result.

If this code were present on a vehicle such as a police car, it would be more of a problem. Police cars tend to idle for extended periods. If a condition exists that sets this code, the vehicle will likely begin to misfire the longer it idles. Most of the time the misfire would clear up once moving, but it may not.

What repairs can fix the P2190 code?

Tune-up:

Fuel injector replacement:

  • Fuel injector connector repair or replace
  • Wiring harness repair to the affected fuel injector
  • Fuel injector cleaning

Fuel Pressure Regulator:

  • If the regulator is vacuum controlled and the vacuum line is attached to a bank 2 intake runner

Additional comments for consideration regarding the P2190 code

Since this code indicates there is a problem on only one bank of the motor, any component that affects both banks can be ruled out. This is very helpful in narrowing down the possibilities. A technician can now ask him or herself what can affect only one bank and not both. There are only a few parts that can do this. Isolating which components are relevant at this point greatly depends on the make, model and year of the vehicle. This is where the importance of factory information becomes necessary to effectively diagnose a condition such as this.

Need help with a P2190 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
Check Engine Light
P2190

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P2190 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,526

Rating Summary
3,215
155
41
23
92
3,215
155
41
23
92

Emmette

33 years of experience
269 reviews
Emmette
33 years of experience
Emmette, was on time and performed service. He was professional and prompt giving me quality service. Overall I was satisfied with his experience observation and service work for my vehicle.
2009 DODGE CHARGER - CHECK ENGINE LIGHT IS ON - LORTON, VIRGINIA

Chet

38 years of experience
393 reviews
Chet
38 years of experience
Chet is the only mechanic we trust!
2005 ACURA TL - CHECK ENGINE LIGHT IS ON INSPECTION - CHULA VISTA, CALIFORNIA

Grzegorz

38 years of experience
440 reviews
Grzegorz
38 years of experience
Mr. Kilon Arrived on time and right away his personality puts you at ease. He's friendly, kind and and you don't get the feeling he's there to drain your pockets. He assessed the problem and told us what he thought was the best course of action and letting us to decide what we felt was best for us.
2006 VOLVO S40 - CHECK ENGINE LIGHT IS ON - DALY CITY, CALIFORNIA

Trung

9 years of experience
397 reviews
Trung
9 years of experience
He knew exactly what he was doing and within minutes diagnosed what was wrong..
2000 HONDA CIVIC - CHECK ENGINE LIGHT IS ON - REDWOOD CITY, CALIFORNIA

More related articles

How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...

Related questions

Q: 2007 Dodge Grand Caravan - Codes P0700, P0734, P0732, P0871, P0846, and P0841

All of the codes that you listed indicate that you have a bad transmission. Since you have so many different codes for the transmission I do not think it is worth trying to fix the codes individually. The best course...

Q: I'm getting code po171 lean bank 1.

There vehicles are known for the intake manifold warping and having fuel injector problems at higher miles. The fuel trims can be checked while the engine is warm and spraying around the intake manifold gaskets to see if the trims...

Q: What is the best fix for a catalyst system efficiency below threshold (bank 2)

Trouble code P0430 is for a catalyst on the drivers side. The sensor after the converter may be bad and not responsive enough or the catalyst itself may be bad. The catalyst should be replaced if the converter rattles, there...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com