P2213 indicates the engine control module has detected an electrical fault in the nitrogen oxides (NOx) sensor circuit for Bank 2. The sensor measures exhaust NOx levels, and the code is set when the expected voltage, signal, or continuity is outside the calibrated range.
The sensor element or internal heater/signal circuitry can degrade from heat, soot, or age, producing an out-of-range circuit reading. This is the most common cause.
Open, shorted, or corroded wires and pins between the sensor and the control module can mimic a failed sensor.
A leak near the sensor mount or contamination from coolant, oil, or soot can distort the signal and trigger a circuit-related code.
A poor ground, damaged heater power feed, or shared 5 V reference problem can cause the NOx sensor circuit to read abnormally.
A rare internal PCM/ECM input or software issue can set this code, but only after all sensor, wiring, and exhaust causes have been ruled out.
Short trips are usually possible, but the vehicle may run in a derated or limp mode, emissions will be elevated, and the catalyzed aftertreatment system may not be properly monitored.
Usually no. The PCM is rarely the actual cause; failed NOx sensors, wiring faults, and exhaust leaks are far more common. PCM replacement should only be considered after sensor and circuit testing are conclusive.
Cleaning can occasionally help if contamination is mild, but it does not repair internal sensor element or heater circuit failures, which are common causes of this code.
Bank 2 is the engine bank that does not contain cylinder number one. On many V-type engines it is the left or passenger-side bank, but the exact location depends on the manufacturer’s cylinder numbering.