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.
DTC Descriptor
- DTC B101D 00
-
Electronic Control Unit Hardware Malfunction
- DTC B101D 04
-
Electronic Control Unit Hardware Open
- DTC B101D 08
-
Electronic Control Unit Hardware Performance - Signal Invalid
- DTC B101D 0F
-
Electronic Control Unit Hardware Signal Erratic
- DTC B101D 12
-
Electronic Control Unit Hardware Low Input
- DTC B101D 13
-
Electronic Control Unit Hardware Low Voltage/High Temperature
- DTC B101D 14
-
Electronic Control Unit Hardware High Voltage/Low Temperature
- DTC B101D 1A
-
Electronic Control Unit Hardware Performance - Bias Level Out of Range
- DTC B101D 2B
-
Electronic Control Unit Hardware Missing Reference
- DTC B101D 2C
-
Electronic Control Unit Hardware
- DTC B101D 31
-
Electronic Control Unit Hardware Internal Checksum Error
- DTC B101D 32
-
Electronic Control Unit Hardware General Memory Malfunction
- DTC B101D 34
-
Electronic Control Unit Hardware RAM Malfunction
- DTC B101D 35
-
Electronic Control Unit Hardware ROM Malfunction
- DTC B101D 36
-
Electronic Control Unit Hardware EEPROM Performance/Malfunction
- DTC B101D 37
-
Electronic Control Unit Hardware Software Malfunction
- DTC B101D 38
-
Electronic Control Unit Hardware Supervision Software Malfunction
- DTC B101D 39
-
Electronic Control Unit Hardware Internal Malfunction
- DTC B101D 3A
-
Electronic Control Unit Hardware Incorrect Component Installed
- DTC B101D 3B
-
Electronic Control Unit Hardware Self-Test Malfunction
- DTC B101D 3C
-
Electronic Control Unit Hardware Internal Communication Malfunction
- DTC B101D 43
-
Electronic Control Unit Hardware EEPROM Incorrect Programming
- DTC B101D 73
-
Electronic Control Unit Hardware Parity Error
- DTC B101D F0
-
Electronic Control Unit Hardware
- DTC B101D F1
-
Electronic Control Unit Hardware
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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