Exception in rendering!

Message: window is not defined

ReferenceError: window is not defined
    at new c (/tmp/execjs20161209-75876-vp19agjs:136:3912)
    at m.mountComponent (/tmp/execjs20161209-75876-vp19agjs:47:15602)
    at /tmp/execjs20161209-75876-vp19agjs:49:31860
    at a.r.perform (/tmp/execjs20161209-75876-vp19agjs:47:12503)
    at Object.a [as renderToString] (/tmp/execjs20161209-75876-vp19agjs:49:31821)
    at r (/tmp/execjs20161209-75876-vp19agjs:50:21164)
    at Object.S.ReactOnRails.serverRenderReactComponent (/tmp/execjs20161209-75876-vp19agjs:32:6073)
    at eval (eval at <anonymous> (/tmp/execjs20161209-75876-vp19agjs:173:8), <anonymous>:10:23)
    at eval (eval at <anonymous> (/tmp/execjs20161209-75876-vp19agjs:173:8), <anonymous>:17:3)
    at /tmp/execjs20161209-75876-vp19agjs:173:8

P2201 OBD-II Trouble Code: NOx Sensor Circuit Range/Performance Bank 1

Check Engine Light

P2201 code definition

NOx Sensor Circuit Range/Performance Bank 1

Related Trouble Codes:

  • P2200: NOx Sensor Circuit Bank 1
  • P2202: NOx Sensor Circuit Low Input Bank 1
  • P2203: NOx Sensor Circuit High Input Bank 1
  • P2204: NOx Sensor Circuit Interm Input Bank 1

What the P2201 code means

The P2201 diagnostic trouble code indicates that the nitrogen oxide (NOx) sensor circuit is out of range or has a performance issue.

The purpose of the NOx sensor is to measure the amount of nitric oxide and nitrogen oxide in the exhaust system, and when the storage capacity of these harmful gases has been reached. When the NOx sensor indicates that the storage capacity has been reached, the regeneration phase is initiated by the fueling management system.

Vehicle manufacturers predetermine the appropriate levels of NOx gases that should be present in the fuel management system. The NOx sensor monitors these levels. When the Engine Control Module (ECM) receives information from the NOx sensor that it is out of range/performance, the P2201 diagnostic trouble code will be stored, and the Check Engine Light will come on indicating that there is a problem that needs to be addressed. It is important to note that several drive cycles may be necessary before the Check Engine Light will come on.

What causes the P2201 code?

  • NOx sensor wires that are broken or shorted
  • NOx sensor connector that is corroded or broken
  • NOx sensor connector pins that are bent
  • Faulty NOx sensor.
  • Engine Control Module that needs to be reprogrammed or replaced

What are the symptoms of the P2201 code?

  • The Check Engine Light will come on in the dashboard
  • There may be no visible symptoms
  • The car may expel more pollutants that it normally should.

How does a mechanic diagnose the P2201 code?

  • Uses an OBD-II scanner to retrieve all of the trouble codes that have been stored by the ECM

  • Checks with your local dealer for any TSB’s related to this code (a lot of manufacturers have a technical service bulletin (TSB) for this trouble code; it consists of reprogramming the ECM or updating the ECM to get rid of the code)

  • Inspects the wiring going to the NOx sensor for shorts or opens in the wiring harness (damaged wiring should be repaired or replaced)

  • Inspects the connector to the NOx sensor for corrosion, damage, or bent pins

If the wiring and connector are in good condition:

  • Checks to see if the NOx sensor is receiving power - there should be a 12-volt signal going to the sensor (if the NOx sensor is not receiving power, this is an indication the it should be replaced)

Common mistakes when diagnosing the P2201 code

  • Failing to inspect the wiring and connector for damage before replacing the NOx sensor

  • Failing to check if this code is under a TSB and allowing the dealer to make repairs if the P2201 trouble code is under warranty

How serious is the P2201 code?

The P2201 trouble code does not cause driveability problems. However, operating a vehicle while this trouble code is stored in the ECM will allow harmful gases to be emitted into the environment, and damage to other components of the engine is possible. It is important to have this trouble code diagnosed and repaired without allowing an extended period of time to pass.

What repairs can fix the P2201 code?

  • Repairing or replacing damaged NOx sensor wiring
  • Repairing or replacing damaged NOx sensor connector
  • Replacing NOx sensor
  • Reprogramming or replacing the Engine Control Module

Additional comments for consideration regarding the P2201 code

It is often necessary to have this issue repaired by the dealer or by reprogramming the ECM. It is important to first check to see if the repair for this trouble code is covered by warranty before replacing any parts. Keep in mind that it is possible for this issue to be resolved by simply updating the ECM.

*Need help with a P2201 code? *

YourMechanic offers certified 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.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Post a question and get free advice from our certified mechanics.

ASK A QUESTION

More related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How to Transfer a Car Title in Idaho
In order to prove ownership of a car, you must have the title. However, when a car is sold, given away or inherited, the title needs...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


Related questions

Q: My car is showing code P1445

Hi Emily. This is one of the common codes associated with the secondary air injection system on that particular Toyota engine. One of the valves may have failed or has contamination inside. The secondary air injection system is an emission...

Q: Misfire caused bad o2 sensor?

As you may know the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed...

Q: Can a front end vehicle accident cause the crankshaft to stick?

Fault code P0015 has to do with with the exhaust cam timing. This fault is set when the engine control unit determines the exhaust cam is not in the position requested by the ECU. Possible causes can be oil flow...