P2200Fuel & Air Metering

NOx Sensor Circuit Bank 1

P2200 means the ECM detected a general electrical fault in the NOx sensor circuit on Bank 1. The sensor monitors nitrogen oxide output for emissions control, and a circuit fault usually points to a failed sensor, wiring, or connector.

🚗 Yes, short-term, but emissions monitoring is affected.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed NOx sensor$200-$700

45%

The NOx sensor element degrades or fails internally.

#2Wiring or connector fault$50-$300

30%

Corroded or damaged NOx sensor harness and connector.

#3NOx sensor heater fault$200-$700

15%

The internal heater circuit has failed open or shorted.

#4ECM or control module issue$300-$1000

10%

Rarely, the module fails to read the sensor signal.

🩺 Common Symptoms

Check engine light
Reduced engine power or limp mode
Failed emissions test
Possible increase in exhaust smell

💰 Repair Cost: DIY vs Shop

DIY Cost

$200-$700

Shop Cost

$400-$1000

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2200

1Scan for related NOx and emissions codes

2Inspect the NOx sensor connector and wiring

3Check NOx sensor live data against expected values

4Replace the NOx sensor if confirmed faulty

❓ Frequently Asked Questions

Can I drive with P2200?

Short-term yes, but it may enter limp mode and will fail emissions, so fix it promptly.

How much to fix P2200?

A NOx sensor replacement typically runs $400-$1000 at a shop.

What causes P2200 most often?

A failed NOx sensor is the most common cause, followed by wiring or connector faults.

🔗 Related Codes

P2201P2202P2203P220AP220B