diff --git a/G7SensorKit/Messages/G7GlucoseMessage.swift b/G7SensorKit/Messages/G7GlucoseMessage.swift
index e0594a3..2aac30a 100644
--- a/G7SensorKit/Messages/G7GlucoseMessage.swift
+++ b/G7SensorKit/Messages/G7GlucoseMessage.swift
@@ -10,8 +10,8 @@ import Foundation
 import LoopKit
 
 public struct G7GlucoseMessage: SensorMessage, Equatable {
-    //public let status: UInt8
-    //public let sequence: UInt32
+    /// Nonzero when the sensor has no current reading, e.g. 0x80 from a failed sensor; glucose is then nil.
+    public let status: UInt8
     public let glucose: UInt16?
     public let predicted: UInt16?
     public let glucoseIsDisplayOnly: Bool
@@ -84,9 +84,7 @@ public struct G7GlucoseMessage: SensorMessage, Equatable {
             return nil
         }
 
-        guard data[1] == 00 else {
-            return nil
-        }
+        status = data[1]
 
         messageTimestamp = data[2..<6].toInt()
 
@@ -95,7 +93,7 @@ public struct G7GlucoseMessage: SensorMessage, Equatable {
         age = data[10..<12].to(UInt16.self)
 
         let glucoseData = data[12..<14].to(UInt16.self)
-        if glucoseData != 0xffff {
+        if glucoseData != 0xffff, status == 0 {
             glucose = glucoseData & 0xfff
             glucoseIsDisplayOnly = (data[18] & 0x10) > 0
         } else {
@@ -104,7 +102,7 @@ public struct G7GlucoseMessage: SensorMessage, Equatable {
         }
 
         let predictionData = data[16..<18].to(UInt16.self)
-        if predictionData != 0xffff {
+        if predictionData != 0xffff, status == 0 {
             predicted = predictionData & 0xfff
         } else {
             predicted = nil
@@ -112,7 +110,7 @@ public struct G7GlucoseMessage: SensorMessage, Equatable {
 
         algorithmState = AlgorithmState(rawValue: data[14])
 
-        if data[15] == 0x7f {
+        if data[15] == 0x7f || status != 0 {
             trend = nil
         } else {
             trend = Double(Int8(bitPattern: data[15])) / 10
@@ -125,6 +123,6 @@ public struct G7GlucoseMessage: SensorMessage, Equatable {
 
 extension G7GlucoseMessage: CustomDebugStringConvertible {
     public var debugDescription: String {
-        return "G7GlucoseMessage(glucose:\(String(describing: glucose)), sequence:\(sequence) glucoseIsDisplayOnly:\(glucoseIsDisplayOnly) state:\(String(describing: algorithmState)) messageTimestamp:\(messageTimestamp) age:\(age), data:\(data.hexadecimalString))"
+        return "G7GlucoseMessage(status:\(status) glucose:\(String(describing: glucose)), sequence:\(sequence) glucoseIsDisplayOnly:\(glucoseIsDisplayOnly) state:\(String(describing: algorithmState)) messageTimestamp:\(messageTimestamp) age:\(age), data:\(data.hexadecimalString))"
     }
 }
diff --git a/G7SensorKitTests/G7GlucoseMessageTests.swift b/G7SensorKitTests/G7GlucoseMessageTests.swift
index 5d61445..dc5cafa 100644
--- a/G7SensorKitTests/G7GlucoseMessageTests.swift
+++ b/G7SensorKitTests/G7GlucoseMessageTests.swift
@@ -127,6 +127,21 @@ final class G7GlucoseMessageTests: XCTestCase {
         XCTAssertEqual(907385, message.glucoseTimestamp)
     }
 
+    func testFailedSensorStatusStillReportsAlgorithmState() {
+        // A failed sensor keeps answering with status 0x80 and its last reading, 103 mg/dL from 2.7 h earlier.
+        let data = Data(hexadecimalString: "4e80856f0a00f6010001f32567001b02670000")!
+        let message = G7GlucoseMessage(data: data)!
+        XCTAssertEqual(0x80, message.status)
+        XCTAssertEqual(.known(.transmitterFailed), message.algorithmState)
+        XCTAssertTrue(message.algorithmState.sensorFailed)
+        XCTAssertNil(message.glucose)
+        XCTAssertNil(message.predicted)
+        XCTAssertNil(message.trend)
+        XCTAssertEqual(683909, message.messageTimestamp)
+        XCTAssertEqual(9715, message.age)
+        XCTAssertEqual(502, message.sequence)
+    }
+
     func testBackfill() {
         let data = Data(hexadecimalString: "cf5802008f00060f10")!
         let message = G7BackfillMessage(data: data)!