Identifix vs AllData: Which Is Better for Finding the Root Cause?

You've got the same fault code on the same vehicle as last Wednesday. Last Wednesday it was a crankshaft position sensor. Was it? Or was the actual fault a corroded wiring connector that you found eventually after 90 minutes, and the sensor was just collateral damage? If you'd been running Identifix's Direct-Hit, you'd have seen "corroded CPS wiring at connector C114 — common fault on this production run" before you touched the vehicle. The comparison between Identifix and ALLDATA is fundamentally a comparison between two diagnostic philosophies: historical pattern recognition versus factory engineering authority. Both are right. Neither is sufficient alone.

What Is Identifix Direct-Hit?

Identifix Direct-Hit is a database of confirmed technician repair records. When a professional workshop resolves a fault and records it in Identifix, that repair record is added to the database. Search for any DTC on any supported vehicle and you get a ranked list of the repairs that other technicians actually performed to fix the fault — with confirmation counts showing how many times each repair resolved the issue.

Key characteristics of Direct-Hit:

• Data sourced from confirmed professional repairs — not manufacturer assumptions
• Indexed by DTC code, symptom, AND by repair (so you can work backwards from a known-faulty component)
• Particularly dense data for common US and Japanese vehicles on high-frequency faults
• Real-world component failure patterns that OEM documentation does not anticipate

What Is ALLDATA?

AllData repair data is the largest OEM-licensed repair information database in North America. It holds direct data licensing agreements with manufacturers, providing repair procedures, wiring diagrams, torque specifications, and TSBs that are sourced directly from the OEM technical information systems.

Key characteristics of ALLDATA:

• OEM-identical documentation — the same data franchised dealers use
• Comprehensive TSB database — vital for identifying known manufacturer fixes
• Complete wiring diagrams and electrical specifications
• Full assembly/disassembly procedures for complex repairs
• Recall data integrated with NHTSA records

Head-to-Head: Diagnostic Workflow Comparison

Diagnostic Task	Identifix Advantage	ALLDATA Advantage
What most commonly causes this code?	✅ Direct-Hit — pattern data across 10,000s of repairs	❌ Lists all possible causes, not ranked by probability
What is the OEM test procedure?	❌ Not primary function	✅ Complete guided OEM diagnostic flowchart
Is there a known manufacturer fix (TSB)?	❌ Limited	✅ Comprehensive and searchable by code/symptom
Which connector is most likely corroded?	✅ Confirmed patterns from real repairs	❌ Only shows connector locations, not failure patterns
What are the correct torque values for reassembly?	❌ Not provided	✅ OEM-exact torque specifications
What is the wiring diagram for this circuit?	❌ Not provided	✅ Complete OEM electrical schematics
How do I program the replacement module?	❌ Not provided	✅ OEM module programming procedure

Real Workshop Scenario: Which Platform Helps More?

Scenario: 2019 Chevrolet Silverado P0300 Random Misfire

Using Identifix Direct-Hit:
Search P0300 on 2019 Silverado. Direct-Hit shows: 63% "AFM lifter failure — common on this LS/LT engine variant", 21% "coil pack failure", 16% "spark plug gap excessive". The technician targets cylinder deactivation system and oil quality first. Diagnosis confirms AFM lifter wear. Job completed in 1.8 hours diagnostic time.

Using ALLDATA alone:
ALLDATA provides the OEM P0300 diagnostic procedure: check each cylinder for misfires using the scan tool, perform power balance test, check compression, fuel delivery, coils, plugs. The process would eventually identify the AFM failure — but may take 3–4 hours tracking through every possible cause without knowing which is statistically most likely.

Combined approach:
Use Identifix to identify AFM as the probable cause, then use ALLDATA's OEM lifter replacement procedure with correct torque values and programming sequences. First-time fix achieved efficiently and correctly.

When Identifix Direct-Hit Outperforms

• Common fault patterns on common vehicle/engine combinations (thousands of repair records)
• Intermittent faults where the confirmation pattern reveals the actual condition causing the failure
• Workshop efficiency priority — fastest path to the correct component under pressure
• Recurring problems across similar model years or engine variants

When ALLDATA Outperforms

• Less common vehicles or uncommon engine variants (thinner Identifix pattern data)
• New model years (insufficient confirmed-fix data has accumulated yet)
• Complex multi-system faults requiring structured elimination methodology
• Safety-critical systems requiring verified OEM procedure documentation
• Module replacement requiring OEM programming sequences
• Warranty or insurance-related jobs requiring verified OEM documentation

Pricing Comparison 2026

Platform	Single User (approx UK)	Best Value Access
Identifix Direct-Hit	£85–£105/mo	Standalone or bundled
ALLDATA Repair	£99–£110/mo	Standalone or bundled
Both together	£184–£215/mo	Two separate subscriptions
AutoFixData (both + 3 more)	£99–£140/mo	One login, 5 platforms

Frequently Asked Questions

Is Identifix available in the UK?

Yes. Identifix is available in the UK, though its confirmed-fix database has historically been densest for North American vehicle makes. UK and European workshop operators will find the greatest value on Ford, Vauxhall/Opel, Toyota, Honda, and VW models with significant North American sales history. Access Identifix through AutoFixData's Identifix integration.

How often is the Identifix database updated?

Identifix Direct-Hit is updated continuously as new repair records are submitted by subscribers. High-volume faults on common vehicles accumulate new confirmed records daily. The database is not static — it grows in accuracy and density over time.

Can I access both ALLDATA and Identifix in one subscription?

Not through their individual providers. AutoFixData provides both within a single bundled subscription, alongside AutoData, HaynesPro, and Mitchell1 ProDemand.

What is the difference between Identifix and Mitchell1's SureTrack?

Both are confirmed-fix databases from real technician repair records. SureTrack (Mitchell1) has 200M+ records and integrates tightly with ProDemand's diagnostic workflow. Identifix Direct-Hit is also substantial, with a slightly more searchable interface by symptom as well as DTC. Both are valuable — professional workshops typically use both through a bundled subscription.

Does Identifix work for diesel vehicles?

Yes. Identifix covers both petrol and diesel vehicles. European diesel coverage is growing, though the database density is greatest for North American vehicles and makes with significant global workshop market share.

Conclusion

Identifix and ALLDATA are not competing — they're complementary. Identifix makes you faster by pointing to the probable cause. ALLDATA makes you more accurate by providing the verified OEM test procedure. Together, they deliver the highest first-time fix rate with the most defensible documentation. In 2026, accessing both through a single bundled subscription removes the cost barrier that historically forced workshops to choose one or the other.

External References: Identifix Direct-Hit official website | AllData official website | ASE automotive certification