What is OBD-II and does my car support it?

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.

How does GaugeAI diagnose car problems?

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.

What OBD-II scanners are compatible with GaugeAI?

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.

Is GaugeAI accurate enough to replace a mechanic?

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.

Which car brands and models does GaugeAI support?

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.

How much does GaugeAI cost?

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.

Is my vehicle data secure and private?

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.

Can I use GaugeAI without an OBD-II scanner?

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.

High SeverityDo Not Drive

What does P0302 mean?

Cylinder 2 Misfire Detected

Direct Answer

P0302 means a misfire was detected specifically in cylinder 2. The diagnosis process is identical to P0301 — isolate the spark plug, coil, and injector for cylinder 2 using the coil-swap test.

Common Symptoms

✓Check engine light on
✓Engine vibration
✓Rough idle
✓Stumbling under acceleration

Common Causes

01Worn spark plug (cylinder 2)
02Faulty ignition coil (cylinder 2)
03Dead injector (cylinder 2)
04Low compression (cylinder 2)

How to Fix P0302

Perform coil swap test

Swap the cylinder 2 coil to another cylinder, clear codes, and test drive. If the misfire moves, replace the coil.

Replace cylinder 2 spark plug

Pull and inspect the plug. Replace if worn or fouled.

Test injector

Verify injector pulse and fuel delivery with a noid light and injector balance test.

Frequently Asked Questions

Is P0302 worse than P0300?

Neither is "worse" — a cylinder-specific code (P0302) is actually easier to diagnose because the fault is localized. P0300 is harder to pin down because the misfire jumps between cylinders.

Estimated Repair Cost

$30–$1500

Same range as P0301.

Safe to Drive?

No — avoid driving

Avoid driving, especially with a flashing check engine light.

Related Codes

P0300 P0301 P0303 P0304

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