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Quick Specs

  • Size:2-1/16" (52.4mm)
  • Type:Digital
  • Range:LEAN-RICH
  • Lighting:LED Segments
  • Instructions: Download PDF


Running too lean while enjoying spirited driving in your vehicle is one of the leading causes of expensive engine damage. AutoMeter’s Narrowband Air/Fuel Gauges pair with older Oxygen Sensors to warn of lean burn conditions under heavy engine load. Connects directly to the factory O2 sensor on many applications, or uses the AutoMeter 2244 Narrowband O2 sensor. Not compatible with 5 wire air/fuel sensors.
Feature Points
  • Compatible with factory narrowband O2 sensors (0-1V)
  • May require model 2244 if the vehicle does not have a factory narrowband primary O2 sensor
  • Features LED radial bar graph display (gauge does not have provision for backlight)
  • Will not work with wideband O2 sensors (0-5V) - please check your specific application before purchase
Ships With
  • 2230
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm



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This is the gauge only yes? Without the sensor?

Asked by: Victorgarage
Thank you for your question. Yes, this is just the narrow band gauge, without the sensor.
Answered by: Zach from AutoMeter
Date published: 2019-04-15

My autometer cobalt narrow band gauge does not light up with a blue back light with my other autometer cobalt gauges. there are three wires coming from the rear of the unit.

Asked by: Chris123
Thank you for your question. 6175 does not feature any back light and is only illuminated by the LEDs on the radial display.
Answered by: Zach from AutoMeter
Date published: 2018-10-10

The installation guide only shows 3 wires red black and violet but i have 4 wires the extra one is white. where does this white wire go?

Asked by: Tman11
Thank you so much for contacting us. Very, very early Narrowband gauges had a lighting circuit in them which is controlled by the white wire. It isn't necessary for the gauge to function as the LEDs are always on, but the wire can be hooked to the headlight switch output to provide additional lighting when the headlights are turned on. Hope this helps!
Answered by: Joseph At AutoMeter
Date published: 2018-05-22

Why would I choose a narrow band AFR vs. a wideband?

Asked by: Robert4
Hi Robert, thank you so much for contacting us. A narrowband AFR gauge uses the older style narrowband oxygen sensor and was designed to tee onto existing OE sensors on older vehicles. These sensor lack the resolution necessary to determine a true ratio and aren't really useful as tuning tools, like a wideband would be. A narrowband will be able to serve as a warning light of sorts for lean conditions reached at WOT. It's an older technology and in most every instance you'll be much better served with a proper wideband. Hope this helps!
Answered by: Joseph Mills
Date published: 2018-03-29

Hello, if more than1volt is applied to the purple wire ( an error ) will it destroy it's narrow band capability? Thanks for listening

Asked by: The mechanical genius?
Thank you so much for contacting us. While the gauge should be able to tolerate slightly more than 1v, it isn't designed to do so and could result in damage to the unit. They're built to be pretty robust, but, for example, applying 12v to a 1v circuit definitely has the potential to harm the circuit. Hope this helps!
Answered by: Joseph At AutoMeter
Date published: 2019-03-15

Hi, would this be a straight replacement for 4375 which I believe is no longer available 

Asked by: Rob1953
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