Complex Electronics Diagnostics

Evidence-led diagnosis of intermittent faults, communication failures and problems affecting multiple vehicle electronics systems.

Car Fault Code and ECU Module Directory

FAULT CODES · ECU FAMILIES · DIAGNOSTIC ROUTES Find a starting point for an automotive fault-code or module enquiry. Search the complete code from your scanner, or browse the guides below. Each article explains the information needed before deciding whether a vehicle needs diagnostics, electronic repair or programming. How to use your diagnostic trouble code

Car Fault Code and ECU Module Directory Read More »

CAN and communication faults U0001, U0073, U0121 and U0140

CAN NETWORK · ABS · BODY CONTROL A lost-communication code tells you that one controller did not receive the information it expected. The named module may be offline, but the cause can also involve its supply, wiring or the network path. Start by finding which controller reported the fault and which controllers still answer a

CAN and communication faults U0001, U0073, U0121 and U0140 Read More »

Checking voltage faults P0560, P0561, P0562 and P0563 before ECU replacement

BATTERY · POWER SUPPLY · ELECTRICAL DIAGNOSIS Voltage-related codes can appear alongside several warning lights or communication faults. Replacing the ECU before investigating its electrical supply can leave the original problem in place. Start with the full vehicle history and a recorded scan. The P0560–P0563 family The applicable thresholds and enabling conditions come from the

Checking voltage faults P0560, P0561, P0562 and P0563 before ECU replacement Read More »

Understanding U0100 and U0101 communication faults

AXION AUTOMOTIVE · DIDCOT & UK POSTAL ENQUIRIES Understanding U0100 and U0101 communication faults Understand an engine or transmission communication fault and prepare the information needed for a useful diagnostic enquiry. Discuss your module or fault → What do U0100 and U0101 mean? These codes concern communication between controllers. U0100 relates to lost communication with

Understanding U0100 and U0101 communication faults Read More »

Postal Module Repair or Workshop Diagnosis?

AXION AUTOMOTIVE · DIDCOT & UK POSTAL ENQUIRIES Postal module repair or workshop diagnosis? How to choose a useful starting point when you have a vehicle electronics fault. Request a repair assessment → Some repair enquiries involve a removed control module. Others need the complete vehicle so the fault can be investigated in context. Knowing

Postal Module Repair or Workshop Diagnosis? Read More »

Your AXION workspace

Find information, prepare an enquiry or return to a saved guide.

Saved guides on this device

Use Save guide on an article to keep a shortcut in this browser. Up to 20 titles and links are stored; this is not an account or a booking.