Vehicle Diagnostics

P0700 is a transmission control module (TCM) generic fault code that means the TCM has detected a fault in the transmission system but is reporting it through the engine ECM. P0700 itself does not tell you what is wrong – it is a flag that other transmission codes are stored in the TCM. To diagnose […]

Fiat vehicles in Australia include the iconic 500 hatchback, the 500X crossover, the Ducato large van (also rebadged as the Ram ProMaster in some markets and used as the base for many motorhomes), the Doblo small van, and the Professional commercial range. They share platforms and powertrains with other Stellantis brands (Alfa Romeo, Jeep, Peugeot, […]

Codes P0101 through P0104 indicate Mass Airflow (MAF) sensor faults. These codes are common on older vehicles and cause noticeable drivability issues: hesitation, stalling, rough idle, and poor fuel economy. Diagnosis is usually straightforward if you understand how MAF sensors work and the order to test things in. What a MAF Sensor Does The Mass […]

Mini vehicles (R50/R52/R53 first-generation BMW Mini, R55/R56/R57 second-generation, F55/F56/F57 third-generation, and the latest F66 generation) are owned by BMW and share many components and electronics with the broader BMW range. They have their own characteristic issues that owners and home mechanics should know about, particularly around the prone-to-fail PSA-co-developed Prince engines (N12, N14, N18) used […]

Codes P0440 through P0457 indicate faults in the Evaporative Emissions Control System – the system that captures fuel vapour from the tank and routes it back through the engine to be burned instead of venting to atmosphere. These codes are frustrating because the fix is often something as simple as a loose fuel cap, but […]

Citroen vehicles share platforms and electronics with Peugeot and DS within the Stellantis group, and include models like the C3, C4, C5 Aircross, Berlingo, and the C5 X. They have their own branding on warning messages but share most underlying technology with their PSA siblings. This guide covers the most common Citroen dashboard warning lights, […]

Peugeot vehicles include the 208, 308, 2008, 3008, 5008, and the Partner and Boxer commercial models. They share many components with Citroen and DS within the Stellantis group, and use similar diagnostic conventions. This guide covers the most common Peugeot dashboard warning lights. Service Light The spanner icon on Peugeot vehicles indicates that scheduled service […]

P0420 (Catalyst System Efficiency Below Threshold, Bank 1) and P0430 (Bank 2) are among the most common check engine codes – and also among the most misdiagnosed. Many vehicles get a perfectly good catalytic converter replaced when the actual fault is much cheaper to fix. Understanding what these codes really mean lets you avoid wasting […]

Renault vehicles include the Megane, Captur, Koleos, Trafic, and Master commercial models. Renault has its own diagnostic conventions and uses a mix of standard OBD-II codes and Renault-specific manufacturer codes. This guide covers the most common Renault dashboard warning lights. Service Light / Spanner Symbol The spanner icon on Renault vehicles indicates that scheduled service […]

Skoda vehicles share much of their platform and electronics with the wider Volkswagen Group, but they have their own service badging and a few model-specific quirks. Common models in Australia include the Octavia, Superb, Kodiaq, Karoq, Kamiq, and Fabia. This guide covers the most common Skoda dashboard warning lights. Check Engine Light Common triggers on […]

Fuel trims are one of the most useful diagnostic tools available through OBD-II live data. They tell you whether the engine is running rich or lean and how much the ECM is adjusting fuel delivery to compensate. Understanding fuel trim values lets you diagnose drivability issues, vacuum leaks, and sensor problems that codes alone may […]

Volvo vehicles are well-known for safety, build quality, and a distinct set of electronic warning messages. The current lineup in Australia includes the XC40, XC60, XC90, and the S60/V60 saloons and wagons. This guide covers the most common Volvo dashboard warning lights and their typical causes. Check Engine Light Common triggers on Volvo vehicles include […]