P2237Fuel & Air Metering

O2 Sensor Positive Current Control Circuit Open Bank 1 Sensor 1

P2237 means the ECM detected an open in the positive current control circuit of the wideband O2 (air-fuel ratio) sensor on Bank 1 Sensor 1. Usually a failed sensor or wiring fault.

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

MEDIUM

severity

🎯 Top Causes, Ranked by Likelihood

#1Failed air-fuel ratio sensor$80-$350

50%

The wideband sensor's pump cell circuit fails open.

#2Open in wiring$50-$300

30%

A break in the current control circuit.

#3Connector corrosion$50-$200

15%

Poor contact opens the circuit.

#4ECM fault$300-$1000

Rarely, the module driver fails.

🩺 Common Symptoms

Check engine light
Failed emissions test
Rough running or poor fuel economy
Possible hesitation

💰 Repair Cost: DIY vs Shop

DIY Cost

$80-$350

Shop Cost

$200-$500

📋 Free OBD2 Code Cheat Sheet

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

🔧 How to Diagnose P2237

1Inspect the air-fuel sensor connector and wiring

2Check for opens in the current control circuit

3Review sensor live data

4Replace the air-fuel ratio sensor if confirmed

❓ Frequently Asked Questions

Can I drive with P2237?

Short-term yes, but it affects fuel control and emissions.

How much to fix P2237?

Usually $200-$500 at a shop; the sensor is $80-$350 DIY.

What causes P2237 most often?

A failed wideband air-fuel ratio sensor or an open circuit.

🔗 Related Codes

P2238P2239P2243P2251P0131