I built CarGeek to be the reference I kept wishing existed: every OBD-II code explained properly, its causes and symptoms cross-linked, and real fixes from real cars accumulating against each one. The corpus is authored and checked against two independent sources; the experience layer is yours. If something here is wrong, say so — being correctable in public is the point.
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Published a diagnosis write-up.
Was here when it started — among the first fifty accounts to contribute.
A specific and very fixable complaint. An electric or hybrid car comes back from having its motor, inverter or rotor position sensor replaced. It drives — but it feels flat, it use...
Worth reading before it happens, because it is close to useless to learn at a motorway charger in the rain. While a car is charging, the connector is **locked into the socket on pu...
An electric car still has a 12-volt battery, and it still runs the lights, the computers, the pumps and the door locks. What it does not have is an alternator. **The DC/DC converte...
Every winter this arrives as a fault report, and almost every time the car is doing exactly what it should. Charging a lithium cell means persuading lithium into the graphite of th...
The tenth-generation Civic's 1.5 turbo has a documented cold-climate habit: on short trips in cold weather, fuel washes past the rings faster than the oil gets hot enough to boil i...
The EA211 in the Mk7 is a solid engine with a short, well-known list of places it draws air the MAF never measured. If yours is holding a lean code with trims high at idle and near...
P0562 says system voltage dropped below what the ECU considers workable. On its own it points at the charging system. Arriving in a crowd — with communication codes, random sensor...
The crankshaft position sensor is the one sensor the engine cannot run without — no crank signal, no spark, no injection. So P0335 comes with a distinctive story: the engine stalls...
P0102 means the MAF signal dropped below its plausible range — dead sensor, no power, or a signal wire problem. Not "reading a bit low": circuit-range codes are electrical complain...
P0500 says the vehicle speed signal is missing or implausible — but "the vehicle speed sensor" is not one part in one place. Depending on the car, the ECU takes speed from a dedica...