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 $79.99. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 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$79.99$20.00
Toyota$79.99$20.00
BMW$79.99$20.00
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

4.8/5

Number of Reviews

4,255

Rating Summary
3,898
174
45
26
112
3,898
174
45
26
112
Ben

Ben

39 years of experience
1020 reviews
Ben
39 years of experience
Lexus LS430 - Check Engine Light is on - Houston, Texas
I was very pleased with the courtesy and work of Mr. Smith. He was exceptional in explaining and correcting the problem and thereby gained my trustI . I request he be my mechanic in all future service requests. I had a great experience working with Mr. Ben Smith.
Richard

Richard

19 years of experience
203 reviews
Richard
19 years of experience
Ram ProMaster 1500 - Check Engine Light is on - Bonita Springs, Florida
Prompt, polite and personal. Took the time to explain the process and his recommendations. 2 thumbs up
Michael

Michael

23 years of experience
37 reviews
Michael
23 years of experience
Ford F-150 - Check Engine Light is on - Federal Way, Washington
Very helpful and explained everything and what needs to be addressed. I feel informed and confident in Mike’s assessment and look forward to him performing services on my vehicle.
Rigoberto

Rigoberto

9 years of experience
650 reviews
Rigoberto
9 years of experience
Honda Civic - Check Engine Light is on - Chicago, Illinois
Rigoberto came on time & quickly diagnosed the problem- rats chewed thru wiring near the battery. He wasn’t able to fix it himself bc of parts, but gave me recommendations on where to go & how to not have the dealership sell me services that are not needed.

More related articles

P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222...
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)...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...

Related questions

Q: My car has poor acceleration.

From what you've described, it sounds like you may have a mass airflow sensor that is giving incorrect data for the altitude you are at. This can cause low power, pinging, and O2 codes indicating a too lean condition. A...

Q: Wrench symbol shows on dash after cranking the engine. Now the wrench symbol stays on.

Hi there. When the wrench light comes on, this is the symbol used by the computer to alert the driver that there is a problem with the engine or transmission and puts the vehicle into limp mode. You would need...

Q: While highway driving, car stopped accelerating & became inoperative

This message indicates there is a problem in the anti-lock braking and/or electronic stability program system. If the problem is severe enough, the vehicle will go into limp mode, as you experienced. The root cause could be anything from a...

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