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14 best fault under $20.00

We picked 14 fault from AliExpress with real orders and good reviews. Prices go from $1.59 to $18.60, the average rating is 4.8 stars and the most popular one has 30.4k orders. Every product opens on AliExpress, where you pay with buyer protection.

Updated: 2026-11

  1. 1Popular ELM327 WiFi OBD2 Diagnostic Scanner V1.5 Car Code Reader Check Engine Fault Detect-54%Popular ELM327 WiFi OBD2 Diagnostic Scanner V1.5 Car Code Reader Check Engine Fault Detect$3.56 $7.75★ 4.9 · 30.4k soldView on AliExpress →
  2. 2Car Diagnostic Tool CY3001 OBD2 Scanner Code Reader Car Voltage Tester Engine Fault Code S-55%Car Diagnostic Tool CY3001 OBD2 Scanner Code Reader Car Voltage Tester Engine Fault Code S$8.32 $18.53★ 4.9 · 8.7k soldView on AliExpress →
  3. 31-20Pcs Universal Car SRS Airbag Simulator Emulator Resistor Bypass Fault Finding Diagnost-58%1-20Pcs Universal Car SRS Airbag Simulator Emulator Resistor Bypass Fault Finding Diagnostic Tool Ai$1.93 $4.55★ 4.9 · 8.5k soldView on AliExpress →
  4. 4V510 Professional Obdii Diagnostic Scanner, Engine Fault Code Reader, Live Data Stream, I/-61%V510 Professional Obdii Diagnostic Scanner, Engine Fault Code Reader, Live Data Stream, I/$7.99 $20.34★ 4.9 · 6.3k soldView on AliExpress →
  5. 51-20Pcs Universal Car SRS Airbag Simulator Emulator Resistor Bypass Fault Finding Diagnost-59%1-20Pcs Universal Car SRS Airbag Simulator Emulator Resistor Bypass Fault Finding Diagnost$1.59 $3.92★ 4.7 · 5.4k soldView on AliExpress →
  6. 6Bluetooth ELM327 OBD2 Car Code Reader Scanner V1.5 Fault Detector Check Engine Automotive-67%Bluetooth ELM327 OBD2 Car Code Reader Scanner V1.5 Fault Detector Check Engine Automotive$2.43 $7.34★ 4.9 · 3.3k soldView on AliExpress →
  7. 7V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault De-57%V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault De$13.04 $30.62★ 4.9 · 2.9k soldView on AliExpress →
  8. 8V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault De-50%V318 Auto Diagnostic Tool Scanner Automobile Battery Tester OBD2 Automobile Clear Fault Detects Supp$15.66 $31.30★ 4.7 · 2.5k soldView on AliExpress →
  9. 9KONNWEI KW906 Bluetooth5.0 - 5.2 OBD2 Scanners ELM327 V1.5 OBDII Fault Diagnostic Tool for-60%KONNWEI KW906 Bluetooth5.0 - 5.2 OBD2 Scanners ELM327 V1.5 OBDII Fault Diagnostic Tool for$11.02 $27.49★ 4.7 · 1.4k soldView on AliExpress →
  10. 10KONNWEI KW905 ELM327 OBD2 Scanner Bluetooth 5.0 Engine Fault Scanner Tool OBDII Code Reade-54%KONNWEI KW905 ELM327 OBD2 Scanner Bluetooth 5.0 Engine Fault Scanner Tool OBDII Code Reade$13.09 $28.30★ 4.7 · 1.1k soldView on AliExpress →
  11. 11Professional V520 Multi-language Automotive OBD2 Scanner Diagnostic Tool Real Time Data OB-58%Professional V520 Multi-language Automotive OBD2 Scanner Diagnostic Tool Real Time Data OBD2 Fault$15.37 $36.20★ 4.9 · 475 soldView on AliExpress →
  12. 12LAUNCH X431 Creader CR3001 OBD2 Scanner Engine Fault Automotive OBDII OBD Code Reader Diag-57%LAUNCH X431 Creader CR3001 OBD2 Scanner Engine Fault Automotive OBDII OBD Code Reader Diagnostic Sca$18.60 $43.67★ 4.9 · 428 soldView on AliExpress →
  13. 13V318 OBD2 Scanner Code Reader, Car Engine Fault Diagnostic Tool With Battery Voltage Test,-53%V318 OBD2 Scanner Code Reader, Car Engine Fault Diagnostic Tool With Battery Voltage Test, Read &$9.20 $19.60★ 4.8 · 129 soldView on AliExpress →
  14. 14Obd2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader, Used to Clear Cel, -52%Obd2 Scanner Code Reader Car Diagnostic Tool Engine Fault Code Reader, Used to Clear Cel, with$9.13 $19.03★ 4.9 · 49 soldView on AliExpress →

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