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.
2017 Alfa Romeo 4C BaseFACTORY OEM SERVICE PROCEDURE
Module, Tire Pressure (TPM)
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| C1001-21 | FRONT LEFT SENSOR - SIGNAL AMPLITUDE < MINIMUM |
| C1001-31 | FRONT LEFT SENSOR - NO SIGNAL |
| C1001-96 | FRONT LEFT SENSOR - COMPONENT INTERNAL FAILURE |
| C1002-21 | FRONT RIGHT SENSOR - SIGNAL AMPLITUDE < MINIMUM |
| C1002-31 | FRONT RIGHT SENSOR - NO SIGNAL |
| C1002-96 | FRONT RIGHT SENSOR - COMPONENT INTERNAL FAILURE |
| C1003-21 | REAR LEFT SENSOR - SIGNAL AMPLITUDE < MINIMUM |
| C1003-31 | REAR LEFT SENSOR - NO SIGNAL |
| C1003-96 | REAR LEFT SENSOR - COMPONENT INTERNAL FAILURE |
| C1004-21 | REAR RIGHT SENSOR - SIGNAL AMPLITUDE < MINIMUM |
| C1004-31 | REAR RIGHT SENSOR - NO SIGNAL |
| C1004-96 | REAR RIGHT SENSOR - COMPONENT INTERNAL FAILURE |
| C1009-42 | TIRE PRESSURE MODULE (TPM) - GENERAL MEMORY FAILURE |
| C1009-49 | TIRE PRESSURE MODULE (TPM) - INTERNAL ELECTRONIC FAILURE |
| C1010-54 | TIRE PRESSURE MODULE (TPM) SENSOR - MISSING CALIBRATION |
| C1012-88 | TIRE PRESSURE MODULE (TPM) SENSOR LOCATION UNDETERMINED - BUS OFF |
| C1013-88 | ID DUPLICATE TIRE PRESSURE SENSOR IDS - BUS OFF |
| C1014-88 | LEFT/RIGHT SIDE TIRE PRESSURE SENSOR LOCATION UNDETERMINED - BUS OFF |
| C1015-88 | FRONT/REAR TIRE PRESSURE SENSOR LOCATION UNDETERMINED - BUS OFF |
| C1016-88 | TIRE PRESSURE MODULE (TPM) SYSTEM DEACTIVATED - BUS OFF |
| U0019-87 | CAN LINE - MISSING MESSAGE |
| U0019-88 | CAN LINE - BUS OFF |
| U1700-86 | BODY COMPUTER MODULE (BCM) - SIGNAL INVALID |
| U1700-87 | BODY COMPUTER MODULE (BCM) - MISSING MESSAGE |
| U1701-86 | ENGINE CONTROL MODULE (ECM) - SIGNAL INVALID |
| U1701-87 | ENGINE CONTROL MODULE (ECM) - MISSING MESSAGE |
| U1703-86 | INSTRUMENT PANEL CLUSTER (IPC) - SIGNAL INVALID |
| U1703-87 | INSTRUMENT PANEL CLUSTER (IPC) - MISSING MESSAGE |
Factory Service Tools
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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.