P2202Fuel & Air Metering

NOx Sensor Circuit Low Bank 1

P2202 means the NOx sensor circuit on Bank 1 is reading a voltage that is too low. This usually indicates a short to ground, an open circuit, or a failed sensor.

🚗 Yes, short-term, but have it checked soon.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed NOx sensor$200-$700

45%

An internal sensor fault pulls the signal low.

#2Short to ground in wiring$50-$300

30%

A damaged harness shorts the signal circuit.

#3Connector corrosion$50-$200

15%

Poor contact drops the sensor voltage.

#4Control module fault$300-$1000

10%

Rarely, the module misreads the input.

🩺 Common Symptoms

Check engine light
Reduced engine power
Failed emissions test
Possible limp mode

💰 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 P2202

1Inspect NOx sensor wiring for shorts to ground

2Check connector for corrosion or damage

3Measure sensor circuit voltage with a meter

4Replace the NOx sensor if confirmed

❓ Frequently Asked Questions

Can I drive with P2202?

Short-term yes, but repair it promptly to avoid limp mode.

How much to fix P2202?

Usually $400-$1000 at a shop including the NOx sensor.

What causes P2202 most often?

A failed NOx sensor or a short to ground in the wiring.

🔗 Related Codes

P2200P2201P2203P220AP220B