Check Engine Light On?
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Don't have a scanner yet? → Which OBD2 scanner to buy?
🛒 Essential OBD Tools
Amazon UKBluetooth OBD2 Scanner
Reads all P, B, C, U codes. Works with iOS & Android. No subscription.
Wired OBD2 Scanner (no phone needed)
Plug & play with built-in screen. Simple, fast, reliable.
Catalytic Converter Cleaner (P0420)
Fuel additive, pour into tank. Often fixes P0420 if caught early.
MAF Sensor Cleaner
Special spray for mass air flow sensor. Fixes P0100, P0101, P0171.
Automotive Multimeter
Essential for testing sensors, battery, alternator voltage.
Universal O2 Lambda Sensor
For P0420, P0130. Choose 4-wire, ~60cm length.
🔌 All OBD2 Scanners on Amazon UK
Bluetooth, wired, multi-brand — from £15. Read and clear codes yourself and save £40-70 per garage visit.
🔥 Most Common OBD Codes in the UK
Catalyst System Efficiency Below Threshold — Bank 1
Random/Multiple Cylinder Misfire Detected
System Too Lean — Bank 1
Exhaust Gas Recirculation (EGR) Flow Insufficient
Intake Air Temperature Sensor High Input
O2 Sensor Circuit Out of Range — Bank 1 Sensor 1
Idle Control System Malfunction
Mass Air Flow (MAF) Sensor Circuit Malfunction
Test your battery / alternator / sensors with a multimeter
Essential for diagnosing P0562, U0100, P0130... From £12.
📋 All Codes by Urgency Level
🟢 Faible (1 codes)
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Don't have an OBD scanner yet?
A £20 OBD2 scanner lets you read and clear fault codes yourself. Save £40-70 every time you'd otherwise visit a garage.