P2254Fuel & Air Metering

O2 Sensor Negative Current Control Circuit Low Bank 1 Sensor 2

P2254 means the negative current control circuit of the O2 sensor on Bank 1 Sensor 2 is reading too low, usually from a short to ground or a failed sensor.

🚗 Yes, short-term, but expect an emissions test failure.

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed O2 sensor$60-$300

45%

The sensor circuit fails low internally.

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

30%

A damaged harness pulls the circuit low.

#3Connector corrosion$50-$200

15%

Poor contact affects the circuit.

#4ECM fault$300-$1000

10%

Rarely, the module driver fails.

🩺 Common Symptoms

Check engine light
Failed emissions test
Catalyst monitor not ready
No major drivability change

💰 Repair Cost: DIY vs Shop

DIY Cost

$60-$300

Shop Cost

$150-$450

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose P2254

1Inspect wiring for shorts to ground

2Check the connector for corrosion

3Test the sensor control circuit

4Replace the downstream O2 sensor if confirmed

❓ Frequently Asked Questions

Can I drive with P2254?

Short-term yes, but it will fail emissions.

How much to fix P2254?

Usually $150-$450 at a shop.

What causes P2254 most often?

A failed downstream O2 sensor or a short to ground.

🔗 Related Codes

P2251P2252P2253P0136P0141