Your #1 most likely cause - ranked by probability for your exact vehicle
Then unlock the full report - $5.99
Causes #2 and #3 with probability scores
Step-by-step repair guide
Parts list with part numbers
Labor hours & cost estimate
Mechanic-ready summary
Relevant recalls & TSBs for your VIN
Shops charge $150+ just to read the code. This costs less and tells you more.
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Parsing DTC codes and vehicle data
Checking NHTSA recalls and complaints
Running AI diagnostic engine
Generating repair guidance
⚡ What you unlock for $5.99
A repair report your mechanic will actually respect.
Built for your exact vehicle. Causes ranked by probability, parts list, labor estimate, and a mechanic-ready summary. No subscriptions, no upsells.
DIAGNOSED
AmpAuto · Repair Report
2026-05-26 · v1.4
P0420
2013 Toyota Camry · 112,000 mi · 2.5L 4-cyl
68%
Failed catalytic converterSubstrate degraded · part $200–$1,400 · labor $100–$300
$300–$1,700
22%
Faulty downstream O2 sensorTest before replacing cat · part $30–$120 · labor $50–$100
$80–$220
10%
Exhaust leak before converterManifold/gasket inspection · part $20–$150 · labor $80–$250
$100–$400
What's inside the $5.99 report
All 3 causes ranked by probability
Step-by-step repair guide
Parts list with OEM part numbers
Labor hours & cost estimate
Mechanic-ready printable summary
Recalls & TSBs for your VIN
Avg outcome per report
$487
saved per user
38s
avg time to result
97%
accuracy top cause
4.9★
customer rating
Real outcomes, last 30 days
Aggregated from user reports
$1,720
Skipped a converter replacement that turned out to be a $78 O2 sensor.
P0420 · 2013 Camry · 112k
$1,150
Diagnosed coil pack instead of a misfire-related cat replacement.
P0302 · 2017 F-150 · 94k
$640
Found a $12 gas cap fix before paying for full EVAP repair.
P0455 · 2019 Civic · 58k
$890
Caught a vacuum leak instead of swapping a perfectly good MAF sensor.
P0171 · 2015 Accord · 87k
AmpAuto vs. the shop
Same question, two paths
What you get
AmpAuto
Shop diagnostic
Price
$5.99
$120–$200
Time to result
30 seconds
1–4 hours
Causes ranked by likelihood
✓
✗
Specific to your exact vehicle
✓
✓
Parts list & cost estimate
✓
Sometimes
Have to leave the house
No
Yes
Money-back guarantee
✓
✗
What people say after using AmpAuto
Real outcomes, real money saved
★★★★★
Told me it was the downstream O2 sensor, not the cat. Saved me $1,100 on a part I didn't need.
MT
Marcus T.Toyota Camry · P0420
★★★★★
Detailed steps to diagnose my P0300. Nailed the bad coil pack in 10 minutes after spending hours guessing.
CR
Chris R.Ford F-150 · P0300
★★★★★
Knew exactly what to tell the shop. They confirmed the same cause. No upsell, no fishing.
JL
Jennifer L.Honda Accord · P0171
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⚡Used by 50k+ car owners
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Common questions
Is this AI accurate enough to trust?
Our model is trained on hundreds of thousands of verified OBD2 scans + real repair outcomes. Causes are ranked by actual probability for your year/make/model. We're confident enough to offer a no-questions refund if the diagnosis doesn't help.
What if my code isn't covered?
We cover all standard OBD2 generic codes (P0xxx), most manufacturer-specific codes (P1xxx, P2xxx), and U/B/C codes too. If we genuinely can't diagnose your code, you don't pay.
How does this compare to a shop diagnosis?
Shops charge $120–$200 just to read your code and tell you what it means. We cost $5.99 and tell you what's actually broken on your specific vehicle, ranked by probability, with parts and labor estimates. We don't sell you the repair, so there's no incentive to upsell.
Will my data be shared or sold?
Never. We use your email only to send your report and (optionally) one-time follow-up tips. No spam, no third-party sharing, unsubscribe with one click. Vehicle info is anonymized in aggregate stats only.
How does the refund work?
Reply to your receipt email within 30 days of purchase and we'll process a full refund. No forms, no phone calls. We're confident in the product because we'd rather lose $5.99 than your trust.
Can I use this on multiple cars?
Each $5.99 unlock is for one diagnosis (one code or set of related codes on one vehicle). Most users only need one because the report is comprehensive. For multiple cars, just run another diagnosis when you need it.
Do I get the report instantly?
Yes. The free first cause appears in about 30 seconds after you submit. After you unlock with $5.99, the full report displays immediately and is also emailed to you for later reference.
What OBD2 codes can you diagnose?
All standard P (powertrain), B (body), C (chassis), and U (network) codes from 1996 and newer vehicles. Enter one code, or several separated by commas for a combined diagnosis.
Do I need a scan tool, or can I just enter a code?
If you already have a code from a prior scan or a shop printout, enter it directly, no equipment needed. A Bluetooth OBD2 scanner also lets you read live sensor data, which can be the difference between a $50 fix and an $800 mistake.
Can I print or share the report with my mechanic?
Yes. After unlocking you get a formatted, mechanic-ready summary you can copy, print, or share. Most customers text it to their shop or bring a printout, and shops consistently confirm the diagnosis.
Still on the fence?Run a free diagnosis. See your #1 cause at no cost. Only pay if you want the full report, and we'll refund it if it doesn't help.
This is cause #1 of 3. Causes #2 and #3 below are also possible - and fixing the wrong one averages $340 in wasted parts. See all three before you order anything.
Cause #2 of 3
🔒 Unlock below
Cause #3 of 3
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Full Diagnostic Report
Causes #2 and #3 account for a combined XX% probability - either one costs more to misdiagnose than this report.
All 3 causes ranked by probability
Step-by-step repair guide
Parts list & part numbers
Labor hours & cost estimate
Mechanic-ready summary
Recalls & TSBs for your VIN
$5.99one-time · instant delivery
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100% money-back guarantee. If the diagnosis doesn't help you fix your car, just reply to your receipt email and we'll refund you in full. No questions, no hassle.
AmpAuto AI · Specific to your exact vehicle · Instant delivery