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.
Accessory Protocol Interface Module (APIM) - Premium DTC Table
| DTC | Description | Action |
|---|---|---|
| B1252:04 | USB Port: System Internal Failure | GO to PINPOINT TEST S |
| B1252:11 | USB Port: Circuit Short To Ground | GO to PINPOINT TEST S |
| B12B8:04 | USB Port #2: System Internal Failure |
NOTE:
This DTC
refers to USB
port #2 on the APIM
itself, which is not used.
|
| B12B8:11 | USB Port #2: Circuit Short To Ground |
NOTE:
This DTC
refers to USB
port #2 on the APIM
itself, which is not used.
|
| B1D79:01 | Microphone Input: General Electrical Failure | GO to PINPOINT TEST Q |
| B1D79:11 | Microphone Input: Circuit Short To Ground | GO to PINPOINT TEST Q |
| B1D79:12 | Microphone Input: Circuit Short To Battery | GO to PINPOINT TEST Q |
| B1D79:13 | Microphone Input: Circuit Open | GO to PINPOINT TEST Q |
| U0140:00 | Lost Communication With Body Control Module: No Sub Type Information | GO to PINPOINT TEST AA |
| U0155:00 | Lost Communication With IPC Module: No Sub Type Information | GO to PINPOINT TEST AB |
| U0257:00 | Lost Communication With Front Control/Display Interface Module: No Sub Type Information | GO to PINPOINT TEST AE |
| U0423:00 | Invalid Data Received From Instrument Panel Cluster Control Module: No Sub Type Information | RETRIEVE and FOLLOW Diagnostic Trouble Codes (DTCs) present in the IPC . REFER to: INSTRUMENTATION, MESSAGE CENTER AND WARNING CHIMES . |
| U2100:00 | Initial Configuration Not Complete: No Sub Type Information | CHECK vehicle service history for recent service actions related to this module. This DTC set due to incomplete or incorrect Programmable Module Installation (PMI) procedures. If there have been recent service actions with this module, REPEAT/PERFORM the APIM programming as directed by the diagnostic scan tool. REFER to: SYNC MODULE [APIM] PROGRAMMING . If there have been no recent service actions, Click here to access APIM HARDWARE TESTING . |
| U2101:00 | Control Module Configuration Incompatible: No Sub Type Information | CHECK vehicle service history for recent service actions related to this module. This DTC set due to incomplete or incorrect Programmable Module Installation (PMI) procedures. If there have been recent service actions with this module, REPEAT/PERFORM the APIM programming as directed by the diagnostic scan tool. REFER to: SYNC MODULE [APIM] PROGRAMMING . If there have been no recent service actions, Click here to access APIM HARDWARE TESTING . |
| U3000:04 | Control Module: System Internal Failure | GO to PINPOINT TEST N |
| U3000:41 | Control Module: General Checksum Failure |
|
| U3000:42 | Control Module: General Memory Failure |
|
| U3000:88 | Control Module: Bus Off |
|
| U3003:16 | Battery Voltage: Circuit Voltage Below Threshold | GO to PINPOINT TEST AF |
| U3003:17 | Battery Voltage: Circuit Voltage Above Threshold | GO to PINPOINT TEST AG |
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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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