Emissions

P2213 — NOx Sensor Negative Current Control Circuit Open (Bank 1 Sensor 1)

Severity: medium Drive with care, to a shop

What P2213 means

A NOx sensor uses internal measuring cells that its electronics drive through dedicated current control circuits. P2213 means an open was detected in the negative current control circuit of the bank 1 sensor. The NOx reading becomes unreliable, so the SCR system cannot dose diesel exhaust fluid (DEF/AdBlue) correctly.

Symptoms

  • Check Engine light or SCR/AdBlue/DEF warning on
  • NOx sensor readings invalid or missing
  • SCR system inactive, reductant dosing disabled
  • Possible start countdown or reduced torque on some vehicles
  • Higher NOx emissions

Possible causes

  1. Failed internal cell in the NOx sensor
  2. Open wire or poor connection in the sensor harness or connector
  3. Corroded or damaged wiring, including power and ground
  4. Faulty NOx sensor control unit or SCR control module
  5. Control module software issue

How to diagnose

  1. Read codes and freeze frame data and look for other SCR or NOx codes
  2. View NOx sensor values and dosing system status on a scan tool
  3. Check DEF level and quality
  4. Inspect the sensor connector and harness for corrosion, chafing, moisture and heat damage
  5. Test the sensor circuits for opens and verify power and ground
  6. Inspect the dosing valve, lines and heater operation
  7. Check for manufacturer bulletins and software updates
  8. Swap in a known good sensor if the wiring tests fine

Common fixes

  • Repair the open wire or replace a damaged connector
  • Replace the NOx sensor
  • Replace the sensor control unit or SCR module if confirmed faulty
  • Update the control module software
  • Clear the codes and confirm P2213 does not return

Questions and answers

Can I drive with P2213?

For a short time, yes, but the SCR system is not working and emissions are high. Some vehicles eventually limit power or prevent restarting.

What most often causes P2213?

Usually a failed NOx sensor or an open or corroded wire or connector. Inspect the harness before replacing the sensor.

Will adding DEF fix it?

No. This code points to an electrical circuit problem in the sensor, not the fluid level. Still, check the DEF level and quality.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.