Code Definition

P2200 — NOx Sensor Malfunction

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

About P2200

P2200 is a generic (obd-ii standard) powertrain diagnostic trouble code recorded for HINO vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P2200 is stored, the module has detected 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 P2200 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

The Engine Control Module (ECM) monitors the NOx sensor circuit and sensor output to ensure correct operation and plausible nitrogen oxide readings for exhaust emissions control. DTC P2200 is set when the ECM detects a malfunction in the NOx sensor operation, such as an invalid or implausible signal, internal sensor failure, or a circuit condition that prevents accurate NOx measurement. This fault is typically identified during closed loop emissions control when the expected NOx sensor feedback does not correspond with operating conditions. When set, the engine may enter a derate or limp mode ...

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