Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2018SONIC LS, 1.8L ENG VIN H, AUTOMATIC TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTINFOTAINMENTCELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B124BDIAGNOSTIC FAULT INFORMATION
2018 Chevrolet Sonic LS, 1.8L Eng VIN H, Automatic Trans
Diagnostic Fault Information
2018 Chevrolet Sonic LS, 1.8L Eng VIN H, Automatic TransSECTION Diagnostic Fault Information
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
| B+ | B124B, 1, 3 | 1, 2 | - | - |
| USB Cable | B124B | B124B | B124B | - |
| Ground | - | 1 | - | - |
| 1. USB port Inoperative 2. Fault may affect one or more components, dependant on fault location 3. Fault affects multiple components, dependant on vehicle equipment |
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RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.