#battery
4 posts in Car Diagnostics blog about "battery" — OBD-II diagnostics, DTC codes, repair. ← All posts
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Auto Start-Stop not working: 8 reasons the system won't kill the engine at traffic lights
Why Auto Start-Stop suddenly stopped working, how OBD-II shows the status (Ready/Not Ready), ECU criteria for the stop, the role of the EFB/AGM battery, and how to diagnose via live parameters.
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Battery and alternator via OBD-II: P0562, P0620, diagnose in 5 minutes
What OBD-II says about the battery and alternator: codes P0562 (low voltage), P0563 (high), P0620 (alternator). How to read system voltage and why "overcharge" is more dangerous than "undercharge".
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Winter Check Engine: 7 typical codes that only appear in the cold
Why Check Engine turns on in winter and disappears in summer: P0128 (thermostat), P0300 (cold-start misfire), P0442 (EVAP), P0507 (idle), P0116 and what to do with "seasonal" codes.
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Car Will Not Start: 12 Causes and a Quick Diagnostic Algorithm
Engine cranks but no fire — or dead silence: how to tell in 5 minutes whether it is the starter, the battery, fuel, plugs, immobiliser, or something deeper.