Here is the comparison table of several universal OBDII fault code scanners, including Autool OL126, Autel AL139, Autool OL129 and Autel AL519.
AUTOOL OL126 vs. Autel AL319 vs. AOTOOL OL129 vs. Autel AL519 Feature & Functions
| Scanner | AUTOOL OL126 | Autel AutoLink AL319 | AUTOOL OL129 | Autel AutoLink AL519 |
| Image |  |
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| Protocols Supported | CAN, J1850 PWM,J1850 VPW,ISO9141 and KWP2000 | CAN, J1850 PWM,J1850 VPW,ISO9141 and KWP2000 | CAN, J1850 PWM,J1850 VPW,ISO9141 and KWP2000 | CAN, J1850 PWM,J1850 VPW,ISO9141 and KWP2000 |
| Vehicle Coverage | All 1996 and newer cars, SUV, mini vans, light Duty vehicles sold worldwide | All 1996 and newer cars, SUV, mini vans, light Duty vehicles sold worldwide | All 1996 and newer cars, SUV, mini vans, light Duty vehicles sold worldwide | All 1996 and newer cars, SUV, mini vans, light Duty vehicles sold worldwide |
| Applicable ECUs | Engine | Engine | Engine | Engine |
| Battery Power Monitor | No | No | Yes | No |
| Read & Clear DTC | Yes | Yes | Yes | Yes |
| Live Datastream | Yes | Yes | Yes | Yes |
| Graphic Display Live Data | No | No | Yes | Yes |
| Freeze Frame Data | Yes | Yes | Yes | Yes |
| ECU Information | Yes | Yes | Yes | Yes |
| Read VIN, CIN, CVN | Yes | Yes | Yes | Yes |
| Live O2 sensor data | Yes | Yes | Yes | Yes |
| I/M monitor readness test | Yes | Yes | Yes | Yes |
| On-board monitor test | Yes | Yes | Yes | Yes |
| Built-in OBDII Fault Code lookup library | Yes | No | Yes | No |
| Live Data Full Description | No | No, only Abbrevation | Yes | No, only Abbrevation |
| Liva data Help | No | No | Yes | No |
| TFT Color Screen | Backit 128*64 picel display with contrast adjusment | Color, 128*64 picel display | 2.8’ TFT color display (320*240 dpi) | 2.8’ TFT color display (320*240 dpi) |
| Multilingugal Menu& Codes | English, Spanish, French, Deutsch, Russian, Dutch,Finnish etc | English, Spanish, French | English, Spanish, French, Deutsch,
Italian, Russian |
English, Spanish, French |
| No | No | No | Yes | |
| Lifetime Free Update via Internet | No update | Yes | Yes | Yes |
