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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. 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.
NOx Sensor Heater Control Circuit High Bank 2
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.
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.
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.
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.
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
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.
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.
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