B0101
Electronic Front End Sensor 1 PerformanceB0101 is a generic OBD-II body diagnostic trouble code: Electronic Front End Sensor 1 Performance. It is logged by the engine control unit when the body monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.
Detailed reference content for B0101 is being prepared. What you see above — the code's group, system, and the software disable option below — is accurate and complete; the long-form explainer, common causes, symptoms, and diagnostic steps will appear here once they have been reviewed.
Related body codes
- B0100 — Electronic Front End Sensor 1 Performance
- B0102 — Electronic Front End Sensor 1 Performance
- B0103 — Electronic Frontal Sensor Circuit
- B0104 — Electronic Frontal Sensor Circuit
- B0105 — Electronic Frontal Sensor Circuit
- B0109 — Side impact module-Left Rear deployment loop resistance is less than 1.3 ohms
Disabling B0101 in software
RaceTune can permanently disable B0101 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.
Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.
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