Point your phone at a check engine light. NexusCode reads every code, rates the severity, and explains exactly what it means — in plain English.
Every diagnostic trouble code — P0 through U3, OEM-specific, ABS, airbag, transmission, ADAS — decoded in under a second. No cryptic hex. No guessing.
Every code ranked Safe / Monitor / Urgent / Critical. Know immediately whether you're looking at a loose gas cap or a towed-home situation.
Real-time fuel trims, O2 sensor readings, coolant temp, RPM, MAF flow. See what the sensor actually saw at the moment the code triggered.
Using telemetry patterns from millions of vehicles, NexusCode forecasts what will fail next. Catch it before it leaves you stranded.
Instant parts lookup — OEM, aftermarket, 3D-printable. Live pricing, local availability, and links to order. One tap from diagnosis to checkout.
Battery state-of-charge, thermal drift, pack health, BMS logs. The diagnostic gaps that existing tools ignore — NexusCode covers.
No subscription. No dongle. No mechanic on call. Just your phone and every answer about your car, distilled into language anyone can act on.
Point your phone at the dashboard. NexusCode detects the wireless OBD-II signal automatically — no pairing, no Bluetooth, no dongle.
All DTCs, system by system. Engine, transmission, ABS, airbag, EV battery — full depth scan in under 10 seconds.
Plain-English explanation of what triggered each code, how serious it is, and the fastest path to a fix — DIY or pro.
Cylinder 1 isn't firing consistently. Most common cause at this mileage: worn spark plug. Could also be a bad ignition coil or fuel injector.
The catalytic converter isn't cleaning exhaust as efficiently as expected. 9 times out of 10 at this mileage, it's the downstream O2 sensor — not the cat.
"The check engine light has been telling you something for years. You just didn't speak its language."
NexusCode is built for the 200 million vehicles on US roads over 12 years old — the ones dealers make the most money off because you don't know what's actually wrong. We fix that.
No subscription. No dongle. No mystery. NexusCode turns your phone into the most capable diagnostic tool you'll ever hold — and it fits in your glove box.