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

Our certified mechanics come to you · 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 $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 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.

Check Engine Light
trouble codes
P2220

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P2220 code.

SCHEDULE P2220 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

P2070 OBD-II Trouble Code: Intake Manifold Tuning (IMT) Valve Stuck Open
P2070 code definition Intake Manifold Tuning (IMT) Valve Stuck Open What the P2070 code means When trouble code P2070 sets, the engine...
P0359 OBD-II Trouble Code: Ignition Coil I Primary/Secondary Circuit Malfunction
P0359 P0359 code definition The P0359 code indicates that a fault has been detected in one of the vehicle’s ignition coils, generally the number 9 coil. This code can also be associated with P0351, P0352, P0353, P0354, P0355, P0356, P0357,...
P0452 OBD-II Trouble Code: Evaporative Emission Control System Pressure Sensor Low Input
P0452 means there is a issue with the fuel tank pressure sensor or the evaporative pressure sensor. Some causes are a loose fuel gap or a vacuum leak.

Related questions

After 10 minutes driving, engine stalls - 2003 Saturn LW300
Hello. It sounds like you are having two different problems. The first is the stalling. I think your fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement) is causing the stalling. The second is the wrench light and transmission not shifting correct. I think it may...
Code P0016
The OBD-II error code P-0016 (https://www.yourmechanic.com/article/p0016-obd-ii-trouble-code-camshaft-position-a-camshaft-position-correlation-bank-1-by-jay-safford) is a generic code that indicates that the camshaft position sensor (https://www.yourmechanic.com/services/camshaft-position-sensor-replacement) for bank one does not correlate to the signal from the crankshaft position sensor. Some of the common trigger points that create...
08' Ford Fusion shifter stuck in park, flashing check engine light, sounds like air bubble in engine or sputtering when given gas
Hello, thank you for writing in. You are likely dealing with multiple problems at once, and only further testing will tell. The first step, due to the check engine light, is to scan the vehicle for diagnostic codes. Use these...

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