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Quick Specs

  • Size:2-1/16" (52.4mm)
  • Type:Digital
  • Range:6:1-20:1 AFR
  • Lighting:Digital LED
  • Instructions: Download PDF


Knowing the exact air/fuel mixture running through your engine is the most important factor to extracting the highest levels of performance and durability. Not all wideband gauges are created equal. AutoMeter utilizes an advanced calibration method that automatically calibrates your gauge on every startup to assure you of the highest degree of accuracy over the entire lifespan of your sensor (no free air calibration is ever necessary). Compatible with nearly all fuel types, the AutoMeter Pro Wideband has a configurable display to pinpoint the exact range you want to keep an eye on. An advanced peak recall function and lean warning system make sure you’re safely making power, whether on the track or on the street. An automatically dimming display tailors light output for any condition. Data logging output is included for one wire or two wire systems in both lambda or AFR. Our specially designed O2 sensor and wiring harness are included for ease of installation. Quite simply, there isn’t a more accurate or easy to live with wideband gauge available on the market.
Feature Points
  • Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, mounting hardware, and detailed instructions for installation
  • 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
  • User programmable range for Rich/Stoic/Lean conditions
  • Peak recall/memory
  • 10:1 to 20:1 AFR range for gasoline applications
  • 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system
  • User Programmable Warning Function
  • Display data in Lambda or numerical A/F ratio
Ships With
  • 2243
  • M18X1.5 Fitting and Plug
  • 2230
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm


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I need a new O2 sensor for my wideband air/fuel gauge. what is the part number and where do I buy it?

Asked by: DonRe 2243 is the correct Wide Band Sensor for this gauge.
Answered by: Jim from AutoMeter
Date published: 2022-02-14

Hi I’ve install a Haltech Elite 2500 ECU with a can base WB Controller with its own Bosch sensor.The Haltech WB harness has his own wiring for a gauge. Can I wire a Autometer WB AFR Gauge to it and get a proper functional reading from the setup?

Asked by: Cronje
You can send the 0-5v output to the ECU from the wideband but you will need a different unit which we do not offer in order to read the output from the ECU to act as a gauge.
Answered by: Steve from AutoMeter
Date published: 2020-05-13

Do you offer a repair kit for this unit, I have this one and the mode button broke, I would like to repair it or send it in for repairs please advise Thank you

Asked by: Leo d
Hi Leo, You may send this gauge for service using this form: Thanks, Jim
Answered by: Jim from AutoMeter
Date published: 2020-05-13

What is the start up time of this AFR Meter? Does it have the 15 second count down? Thanks!

Asked by: Scottie
Thank you for your question. Once the gauge sees 13.5+ volts of power, it will begin a 20 second countdown while the sensor is heating.
Answered by: Zach from AutoMeter
Date published: 2019-08-06

Will this meter work with o2 simulators and a tune

Asked by: leb236
Hi there, thank you for contacting us. O2 simulators typically plug into a computer and simulate the presence of a sensor when one is not there. Our Wideband Air/Fuel gauge includes its own O2 sensor that must be installed for the gauge to properly function.
Answered by: Matt from AutoMeter
Date published: 2018-06-28

Is the air fuel ratio meter calibrated for pure gasoline or 10 percent ethanol in most pump gas ?

Asked by: Steve g
Hi Steve, thank you for connecting with us. Our Pro Series Wideband can read an air/fuel ratio range of 6:1 to 20:1, which includes unleaded gasoline, methanol, and ethanol. While pure gasoline has a stoichiometric ratio of 14.7:1, 10% ethanol with be 14.04:1.
Answered by: Matt from AutoMeter
Date published: 2018-02-07

How does the installation depth of the O2 sensor depth in the exhaust pipe affect the reading? My headers already have bungs welded in but they're about 1" tall.

Asked by: mxlw
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