Free Tools & Guides for UK Garages and Drivers
Free calculators, a fault code lookup and practical guides for garage owners and the drivers they look after.
From practical guides to real-time cost calculators, everything here is free to use with no sign-up required. Browse the knowledge base for garage owner and MOT guides, look up an OBD2 fault code, calculate EV charging costs or the upcoming road tax bill, or read the latest news for UK garages. All resources are written and maintained by the AutoChain team for UK drivers and garage owners.
Knowledge Base
Guides for garage owners, MOT preparation, and buying & selling advice.
Browse guides →OBD2 Fault Code Lookup Beta
Search P, B, C, and U diagnostic trouble codes to find descriptions, symptoms, and fixes.
Search codes →EV Charge Calculator
Calculate the cost to charge your electric vehicle at home or at public chargepoints.
Calculate cost →Pay Per Mile Calculator
Estimate your EV or PHEV running costs under the new pay-per-mile road tax from 2028.
Calculate costs →News & Updates
The latest news and guides for UK garages.
Read news →