01
Input Methods
OBD-II Adapter
Photo Upload
CSV / Log File
Manual Entry
Connected · 2022 Porsche Taycan
Step 01
Connect
OBD-II adapter, photo, CSV, or manual entry — GaugeAI reads every format, from any device.
One light. 5,000+ possible codes.Your car just told you something.
Your car just told you something.
GaugeAI tells you what it is.
Plug any OBD-II reader into your car — or upload a photo of the codes. GaugeAI reads the live engine data and hands back the root cause, whether it's safe to drive, and what the repair should actually cost. In plain English, in under 30 seconds.
Without it, your options are
Guess. Search the code and hope. Or pay a diagnostic fee for someone to read the same code back to you and quote a part that may not be broken.
Free plan · No card required · Any OBD-II vehicle (1996+)Free plan·No card required·Any OBD-II vehicle (1996+)
OBD-II link · live2016 Toyota Camry LE
Reading fault memory
· · · ·
Scanning stored + pending codes…
1 · Read codes
2 · Analyze live data
3 · Plain-English fix
Root cause
Upstream O2 sensor — not the catalytic converter.
The Bank 1 sensor is stuck at 0.03 V, so the ECM blames the catalyst. Converter efficiency itself tests within spec.
Real cost
$45–$80
Dealer quote: $1,100 converter
Safe to drive
Yes
Short trips until fixed
Confidence94.7%
Live sensor streamO2 B1 0.03VCAT 846°FTRIM +8.4%
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One standard. More than 10,000 vehicle models.
Toyota
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Accuracy Rate
How GaugeAI works
Plug in. GaugeAI thinks. Issue Diagnosed.
One connection turns raw vehicle data into an answer you can actually use — in under 30 seconds.
Interactive dashboard
When your dashboard lights up, we translate it.
Warning lights are only the symptom. GaugeAI reads the code and live sensor context, traces the likely cause, and gives you a practical next step. Try the dashboard below.
100 live faultsOne-click simulationNo scanner required
From warning light to useful answer
01P0XXX
Fault codes
Decoded into plain English
0294%+
Root cause
Evidence-backed diagnosis
03$
Repair cost
Know before you visit a shop
Live demo · system ready100 PROBLEMS FOUND
GAUGEAI FIXING · 100
ALL OK
Demo vehicle · 2022 Porsche Taycan
Same codes. Same sensor logic. Plain-English result.
The process
02
AI ENGINE
Step 02
Analyze
Our AI cross-references 10,000+ manufacturer records and 2.4M past diagnoses to isolate the root cause — not just the code.
03
P0420Moderate
O2 Sensor — Not the Converter
False P0420 triggered by upstream sensor
Fix cost
$45–$80
You save
$1,020
Safe to drive short trips
Step 03
Results
Plain-English diagnosis, root cause (not just the code), cost range, and a safe-to-drive verdict — instantly.
Your Scanner Shows Codes. GaugeAI Shows Answers.
A $300 OBD scanner tells you a code existed. It can't tell you why, what it'll cost, whether to keep driving, or what your car is doing right now — even when no warning light is on.
ELM327 SCANNER v2.1
DIAGNOSTIC TROUBLE CODE
P0420
CATALYST SYSTEM EFFICIENCY
BELOW THRESHOLD (BANK 1)
▸ No additional data.
▸ Press CLEAR to erase.
FREEZE FRAME: N/A
PENDING CODES: N/A
LIVE DATA: NOT SUPPORTED
That's all a traditional scanner gives you.
vs
GaugeAI · Diagnostic Report
P0420Moderate
O2 Sensor — Not the Converter
False P0420 triggered by upstream sensor failure on Bank 1.
Replacing the converter would be a $1,020 mistake.
Actual fix cost
$45–$80
Dealer quoted $1,100
Safe to drive?
YES
Short trips only
Live Sensor Data
O2 Bank 10.03V
Fuel Trim+8.4%
RPM1,040
Catalyst °F846°
AI Confidence
94.7%
Live Sensor Stream·MAF · g/s
⚠ Anomaly6.8 g/s
3020100
19:03:4019:03:5019:04:0019:04:1019:04:2019:04:30
Beyond fault codes
What traditional scanners miss
Live context reveals problems a one-time code scan cannot see.
No Warning Light — But Something's Wrong
01LTFT B1+14.7%
PendingP0171
StatusNo CEL
✗
Traditional scanner says "No fault codes found." You assume the car is fine.
✓
GaugeAI monitors live PIDs and catches pending codes + sensor drift before they hit the threshold that triggers the CEL.
The Fault That Keeps Disappearing
02Occurrences4×
TriggerCold start
RootP0300
✗
Intermittent misfire clears itself. Traditional scanner shows nothing — but the rough idle returns every cold morning.
✓
GaugeAI stores freeze frame history and cross-references RPM/MAF patterns to identify temperature-triggered faults that come and go.
5 Codes at Once — Which One Is Actually Wrong?
03Root causeP0300
Symptoms4 codes
FixVac. leak
✗
A misfire cascade triggers P0300, P0171, P0174, P0507, and P0128 simultaneously. Traditional scanner lists them all equally.
✓
GaugeAI traces the causal chain. P0300 is the root — a vacuum leak causing lean conditions. The other 4 are downstream symptoms, not causes.
Six Ways GaugeAI Works for You
Watch a live diagnosis — from plugging in your OBD-II adapter to receiving a complete AI-powered repair report in under 30 seconds. Click any stage or press OK to advance.
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pwr
scan
bt
Waiting for adapter...
OBD-II Interface Port
Connected · 500kbps
Plain English Reports
Universal Compatibility
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Cost Estimates
Predictive Maintenance
Multi-Input Support
Built for Every Driver
Whether you own one car or manage a fleet of hundreds, GaugeAI gives you the same diagnostic intelligence your mechanic has — instantly, affordably, and in plain English.
Know before you pay.
It's 10 pm. Check engine light on. Instead of panicking, Googling, or booking a $150 diagnostic scan — you plug in, and GaugeAI tells you exactly what's wrong in 30 seconds. You walk into the shop knowing the answer before they do.
$1,200
saved per year, on average
- Decode any fault code instantly
- See repair cost ranges upfront
- Know if it's safe to drive right now
GAUGEAI · DIAGNOSTIC REPORT
DTC CodeP0420
SystemCatalytic / O2
Root CauseO2 Sensor Bank 1
Est. Repair$45 – $120
UrgencyNon-critical
Drive Safe✓ YES
— AI analysis complete —
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$45
not the $1,100 they quoted
“They quoted me $1,100 for a new catalytic converter. GaugeAI said it was just an O2 sensor. Fixed it myself for $45. I'll never visit that dealer again.”
ET
Emma Torres
Kia Soul Owner · App Store
Middle of nowhere.
check engine light on, alone
“GaugeAI told me exactly what it was and confirmed it was safe to drive to the next city. That kind of clarity is priceless.”
PS
Priya Sharma
Toyota RAV4 Owner · App Store
“GaugeAI caught a transmission issue my local shop completely missed. It saved me over $2,000 in repairs I didn't need. I now scan every car before signing anything.”
MT
Marcus Thorne
Tesla Model S Owner · App Store
Saved $2,000
70%
faster per diagnostic job
“Every car that comes into my garage gets a GaugeAI scan first. It catches things we'd have spent 20 minutes diagnosing manually.”
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Mike O'Brien
Independent Mechanic · Google
First scan.
caught what two shops missed
“Two shops told me nothing was wrong. GaugeAI found a misfiring cylinder on the first scan. Paid $80 for a coil pack — car runs perfect.”
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Daniela Cruz
Chevrolet Malibu Owner · Google
40
vehicles. one dashboard.
“Managing a fleet of 40 vans without predictive data is a nightmare. GaugeAI is now our maintenance standard. Downtime is down, costs are down.”
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Fleet Director · Google Play
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Expert advice on diagnostics, maintenance and getting the most from your car.
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Support response
OBD-II (On-Board Diagnostics II) is a standardized system in all cars manufactured after 1996 in the US and 2001 in the EU. If your car was built after these dates, it almost certainly has an OBD-II port, typically located under the dashboard near the steering column.
GaugeAI uses advanced AI models trained on millions of diagnostic records to analyze your OBD-II error codes, sensor data, and vehicle information. It cross-references manufacturer-specific databases to provide accurate, plain-English explanations and repair recommendations.
GaugeAI works with any ELM327-based Bluetooth or WiFi OBD-II scanner. Popular options include BAFX Products, Veepeak, and BlueDriver. You can also upload data manually through photos, CSV files, or raw diagnostic logs.
GaugeAI achieves 99.2% accuracy in code interpretation and provides detailed repair guidance. While it is an excellent first-line diagnostic tool that can save unnecessary mechanic visits, we recommend professional inspection for complex repairs and safety-critical issues.
GaugeAI supports over 10,000 vehicle models across all major manufacturers including Toyota, Honda, BMW, Mercedes-Benz, Ford, Chevrolet, Hyundai, Kia, Volkswagen, Nissan, Changan, and many more. Our AI is trained on manufacturer-specific diagnostic data for more precise results.
GaugeAI offers a free plan with 5 diagnostic scans per month. Our Pro plan at $14/month includes unlimited scans, full diagnostic history, repair cost estimates, and priority AI analysis. Fleet plans start at $89/month for businesses managing multiple vehicles.
Absolutely. All diagnostic data is encrypted in transit and at rest using AES-256 encryption. We never share your vehicle data with third parties. You can delete your data at any time from your account settings. We are SOC 2 Type II compliant.
Yes. While direct OBD-II connection gives the most comprehensive results, you can also upload photos of your dashboard warning lights, paste error codes manually, upload CSV data exports from other tools, or share scanner screenshots for AI analysis.
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