OBD Code
P0128 — Coolant Thermostat (Below Regulating Temp)
P0128 commonly indicates the engine isn't reaching its normal operating temperature in the expected time, which often points to the thermostat or…
SeverityModerate
Sensors & Circuits
OBD Codes
OBD Code
P0131 — O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0131 commonly indicates the upstream oxygen sensor is reading low voltage, which can indicate a sensor, wiring, or mixture issue. Scan the…
SeverityModerate
OBD Code
P0113 — Intake Air Temp Sensor High
P0113 commonly indicates the intake-air-temperature signal reads high (or open), usually a sensor or wiring issue. Scan the live data and confirm…
SeverityLow
OBD Code
P0335 — Crankshaft Position Sensor Circuit
P0335 commonly indicates the crankshaft position signal is faulty, which can cause stalling or a no-start. Scan the live data and confirm…
SeverityHigh
OBD Code
P0521 — Oil Pressure Sensor/Switch Performance
P0521 commonly indicates the oil-pressure sensor reads out of expected range — treat low oil pressure seriously. Scan the live data and…
SeverityHigh
OBD Code
P0133 — O2 Sensor Slow Response (Bank 1 Sensor 1)
P0133 commonly indicates the upstream oxygen sensor is responding slowly, often a sign of an aging sensor. Scan the live data and…
SeverityModerate
OBD Code
P0141: O2 Sensor Heater Circuit Bank 1 Sensor 2
P0141 usually means the heater circuit for the downstream oxygen sensor on bank 1 is not behaving as expected. Usually OK for…
SeverityModerate
OBD Code
P0155: O2 Sensor Heater Circuit Bank 2 Sensor 1
P0155 usually means the heater circuit for the upstream oxygen sensor on bank 2 is drawing or reporting an unexpected electrical condition.…
SeverityModerate
OBD Code
P0325: Knock Sensor Circuit Bank 1
P0325 usually means the computer sees a fault in the knock sensor or its circuit. Drive gently and avoid heavy throttle until…
SeverityModerate
OBD Code
P0135: O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)
P0135 means the heater inside the upstream oxygen sensor isn't working, so the computer runs blind (and rich) longer after every cold…
SeverityLow