P2220 OBD-II Trouble Code: NOx Sensor Heater Control Circuit High Bank 2

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

SCHEDULE P2220 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P2220 code

P2220 is a diagnostic trouble code (DTC) for "NOx Sensor Heater Control Circuit High 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 P2220 DIAGNOSTIC Get a fair and transparent estimate upfront

P2220 code definition

NOx Sensor Heater Control Circuit High Bank 2

What the P2220 code means

P2220 is an OBD-II code for the engine control module (ECM) detecting the NOx sensor heater control circuit has a high voltage reading for bank 2 of the engine.

What causes the P2220 code?

  • The engine control module (ECM) monitors the NOx heater control circuit. The ECM detected the NOx heater circuit voltage is high indicating a short in the NOx sensor heater circuit.

  • The bank 2 of the engine cannot go into closed loop fast enough and will cause the sensor to have a slow response signal until it gets heated up by the exhaust and not the heater circuit.

What are the symptoms of the P2220 code?

  • The Check Engine Light will be illuminated and the code is set in ECM memory as a fault.

  • The engine may run lean on bank two and the engine may run rough and misfire.

  • The ECM may go into open loop and possible failure mode depending on the failure strategy of the computer programming.

How does a mechanic diagnose the P2220 code?

  • Scan for codes and document the code in the ECM and look at the freeze frame data for failure

  • Monitor the NOx sensor for bank 2 heater control circuit and compare to sensor for bank 1

  • Check the O2 sensor and wiring for physical damages

  • Follow the manufacturer pinpoint tests for the diagnosis and replacement of the NOx sensor on bank 2 sensor 1.

Common mistakes when diagnosing the P2220 code?

  • Clearing ECM memory codes before checking the freeze frame data for the main failure problem, so the failure may be duplicated and repaired

  • Failing to clear the ECM codes after the codes are fixed so the ECM will enable the system to operate normal again

  • Failing to check the harness for shorts in the harness or connector

How serious is the P2220 code?

Code P2220 is a code indicating the engine NOx sensor heater circuit is shorted out and may cause the engine to emit excessive NOx gas and fail emissions. High NOx could mean the engine is running too lean.

What repairs can fix the P2220 code?

  • Repairing a melted harness and connector
  • Replacing the NOx sensor for bank two
  • Rechecking the system to make sure it goes into closed loop and the NOx sensors are reading correctly

Additional comments for consideration regarding the P2220 code

Code P2220 is for a shorted NOx sensor on bank 2 heater circuit, and the most common failure is the sensor being damaged physically or oil soaking and causing an internal short on the sensor heater wires. High NOx means the engine is running too lean and can damage pistons and head chambers or valves.

Need help with a P2220 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
P2220

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

SCHEDULE P2220 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

3,696

Rating Summary
3,372
162
42
24
96
3,372
162
42
24
96

Troy

37 years of experience
56 reviews
Troy
37 years of experience
Troy is a consumate professional and a great guy to boot.
2005 FORD EXPEDITION - CHECK ENGINE LIGHT IS ON - PHOENIX, ARIZONA

Brikk

15 years of experience
299 reviews
Brikk
15 years of experience
He was amazing
1995 BMW 530I - CHECK ENGINE LIGHT IS ON - CHARLOTTE, NORTH CAROLINA

Theodore

13 years of experience
814 reviews
Theodore
13 years of experience
An outstanding professional who provides a 360 view and transparency in everything he does. I had a really hard engine problem to repair (Lean System). Theodore tried A then B then C....till he identified what caused the misfire of the engine. Based on my previous horrible experiences with some local car repair shops, i can tell you for a fact that he saved me many 00's, if not 000's, of dollars. Highly recommended, will call him again for some other minor issues with a second car we have.
2006 FORD ESCAPE - CHECK ENGINE LIGHT IS ON - SAMMAMISH, WASHINGTON

Matthew

30 years of experience
363 reviews
Matthew
30 years of experience
Was on time and understanding that I was working also in and out in no time
2010 FORD F-150 - CHECK ENGINE LIGHT IS ON - HAMPTON, VIRGINIA

More related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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....
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...

Related questions

Q: Acceleration hesitation while climbing up sometime check engine light appear, high fuel consumption.

I would recommend checking the mass air flow sensor as this is a commonly known part that can cause this kind of loss of power. This regulates the air intake into the fuel injection and ensures a proper air/fuel mixture....

Q: Check engine light spontaneously comes on

Hi there, thanks for writing in about your 2003 Geo Tracker. There are numerous potential causes for the problem you are having. It could be anything from a bad spark plug to a failed sensor. The only way to know...

Q: Transmission doesn't shift, gets stuck in fail safe mode.

Depending on the circumstances, it may in fact be in "fail-safe" mode. When this happens you will normally also have a Check Engine Light on which will usually cause fault codes to be registered in the ECU. When the vehicle...

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