Product Summary

Universal Fit, 2-1/16" Gauge Diameter, White/Red

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    Key Specs

    MFG. Part #30-0311
    BrandAEM Electronics
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    Need To Know

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    AEM Electronics 30-0311 Details

    AEM’s X-Series OBDII gauge (PN 30-0311) puts multiple channels of data at your fingertips by reading the CAN bus stream of your vehicle’s OBD port and transmitting those channels to the gauge display. It reads Diagnostic Trouble Codes (DTCs) and gives you the ability to clear codes. Wiring is as simple as connecting the gauge to your vehicle’s OBDII port using the supplied connector! Because the X-Series OBDII gauge reads OBDII parameters transmitted through a vehicle’s CAN datastream, it will only work on 2008+ model year vehicles.

    EASY TO USE

    Use the ‘Page’ button on the gauge face to scroll through available channels of data transmitted through the OBD port. Possible channels are listed below and may include IAT, EGT, RPM, Ethanol %, MAF, Fuel Pressure, Manifold Pressure, Boost Pressure, TPS, Vehicle Speed, Lambda and more (channel availability is ultimately dependent upon what channels are programmed to transmit by the vehicle manufacturer).

    READ & CLEAR TROUBLE CODES

    The ‘DTC’ button tells the gauge to scan for trouble codes and will report any stored DTCs, allowing you to look them up and determine the course of repair. This button also allows users to cleat DTCs once the problem is resolved.

    The X-Series OBDII Gauge has a bright four-digit LED display that is 87% larger than our original digital gauges and provides better readability. A sweeping LED “needle” lines the edge of the gauge face for quick reference. A 33% overall increase in the gauge face display makes it easier to see at a glance. X-Series Gauges come with a black bezel and faceplate, and an optional silver bezel/white faceplate accessory kit is available (PN 30-0311-ACC, sold separately).

    Despite the larger display, X-Series Gauges are contained in a standard 2-1/16th-inch (52mm) diameter housing for mounting in a standard gauge pod. Thanks to an advanced single board design, X-Series Gauges have an incredibly slim overall depth of under 0.825”, with a cup depth of only 0.200.” This shallow cup depth allows X-Series Digital Gauges to be mounted practically anywhere.

    Features

    • Reads data channels from 2008+ MY vehicles through the OBDII port!
    • Reads and clears Diagnostic Trouble Codes (DTCs)!
    • Easy to install and wire –power and data come from OBDII port using supplied connector
    • Slim 0.825” overall gauge depth and 0.200” cup depth – mount them virtually anywhere!
    • 2-1/16th (52mm) gauge diameter for easy mounting in gauge pods
    • Positive locking connector provides secure connection
    • Auto-dimming sensor delivers ideal display brightness
    • 24 green outer LEDs for quick reference to engine parameter
    • Black bezel and black faceplate included (silver bezel/white faceplate sold separately, PN 30-0311-ACC)
    • Compatible with vehicle/system voltages up to 16V

    Rebates

    Holley October Promo 10% Off Select Parts Sale

    Holley October Promo 10% Off Select Parts SaleHolleyOctoberPromo10%OffSelectPartsSale

    Holley's October Promo 10% Off Select Parts Sale, running from September 28, 2026, through November 1, 2026. For a limited time, customers can save up to 10% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts including Holley, Brawler, Quick Fuel, Leg Wheels, Rev Wheels, Rocket Racing, Flowtech, Edge, Racequip, Apr and Dinan. Purchases must be made between September 28, 2026, through November 1, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period. Following the promotion, these parts will revert back to standard pricing.

    AEM Electronics 30-0311 Specifications

    KEY SPECS
    MFG. Part #30-0311
    BrandAEM Electronics
    GENERAL
    Gauge Diameter2-1/16"
    Gauge SeriesDigital
    Gauge Face ColorBlack/Luminescent green
    Lettering ColorWhite/Red
    Liquid FilledNo
    LightedYes
    Bezel FinishBlack
    Gauge SweepDigital Numeric
    Sending UnitElectrical
    Sending Unit IncludedYes
    OEM ReplacementNo
    GTIN Code840879025304
    Sold in QuantityEach

    Ratings & Reviews

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    Limited use product

    3.0

    3 years ago

    New Chevy Guy

    San Jose CA

    Verified

    PIDs that can could be read by my dyno/tuner could NOT be read by this product, even though the PID was on the products list. What is the relevance of the PID hex code? The usefulness of the product is unpredictable!

    Would Not Recommend

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