Code Definition

P220E (13) — NOx Sensor Heater Control Circuit Range/Performance (Bank 1 Sensor 1)

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P220E

P220E is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P220E is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; a bank-specific fault, meaning it applies only to one cylinder bank of a multi-bank engine; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P220E is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

DTC P220E indicates a range or performance fault in the NOx sensor heater control circuit for Bank 1 Sensor 1. The NOx sensor uses an internal heater to bring its sensing element up to operating temperature quickly so it can measure oxides of nitrogen for the SCR and emissions strategy, and the module monitors the heater circuit. The code sets when the heater is commanded on but its electrical response or heating effectiveness falls outside the calibrated range, for example incorrect current draw or too slow a warm up, rather than a clear open or short. Until the sensor reaches temperature its...

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