P2204

NOx Sensor Circuit Intermittent Bank 1 Sensor 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Deterioration of engine performance in some modes
Increased fuel consumption
Unstable engine idling
Possible problems with passing technical inspection

Causes

Damaged NOx sensor wiring or connectors
Poor contact in the sensor connector
NOx sensor malfunction
Circuit Grounding Problems
Engine control module malfunction

How to Fix

Check the integrity of the NOx sensor wiring and connectors
Clean sensor connector contacts
Check sensor resistance and signal according to specification
If necessary, replace the NOx sensor
Check and correct grounding problems

Related codes

P2201 P2202 P2203 P2205