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

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2201 code

P2201 is a diagnostic trouble code (DTC) for "NOx Sensor Circuit Range/Performance Bank 1". 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 $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P2201 DIAGNOSTIC Get a fair and transparent estimate upfront

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.

Check Engine Light
trouble codes
P2201

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2201 code.

SCHEDULE P2201 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P2000 OBD-II Trouble Code: NOx Trap Efficiency Below Threshold Bank 1
P2000 code definition NOx Trap Efficiency Below Threshold Bank 1 What the P2000 code means P2000 is a general OBD2 diagnostic trouble...
P2119 OBD-II Trouble Code: Throttle Actuator Control Throttle Body Range/Performance
P2119 code definition Throttle Actuator Control Throttle Body Range/Performance What the P2119 code means This code indicates that the throttle valve is...
P0813 OBD-II Trouble Code: Reverse Output Circuit Malfunction
P0813 P0813 code definition P0813 is the fault code for the Reverse Output Circuit. What the P0813 code means This is the generic OBD-II fault code indicating an issue within the reverse output circuit. When you shift your vehicle into...

Related questions

Warning light on
Hi, the Check Engine Light turns on when the car's computer detects a fault somewhere. While you are driving the car, the computer is constantly checking all of the signals coming from the sensors throughout the vehicle. The computer knows...
When accelerating the car begins to jerk real bad.
Usually when the Check Engine Light (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) flashes, it is an indication that you have a severe misfire (https://www.yourmechanic.com/services/engine-is-misfiring-inspection) that may cause damage to the catalytic converter (https://www.yourmechanic.com/services/catalytic-converter-replacement). Most of the time this is due to failing ignition components. That...
My car won't accelerate past 25 mph. Check engine light is on, the code is for an oxygen sensor. 2002 Lexus GS300
Hello. From the explanation that you are giving me it sounds like you have a catalytic converter that is failing. When this occurs it will give you these codes and will cause a loss of power. You should have this...

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 (855) 347-2779 · hi@yourmechanic.com