P0303 Hyundai Equus: Cylinder 3 Misfire Diagnosis

If your Hyundai Equus has the P0303 trouble code, you should know that it’s about as common of a code as there is. It’s a generic code (same meaning for all vehicles) that indicates that your car’s third cylinder is misfiring. P0303 is a real drivability concern and should be dealt with right away. If … Read more

Hyundai Equus P0113: IAT Sensor → High Input Problem

P0113 is an OBDII trouble code that occurs when the Hyundai Equus’s engine management computer detects that there is an issue with the Intake Air Temperature (IAT) Sensor, specifically that there is a High Input Problem with it. P0113: IAT Sensor – High Input Problem The IAT sensor is responsible for measuring the air temperature … Read more

Hyundai Equus P0141 Diagnosis

P0141 is a very common OBDII code that occurs in the Hyundai Equus. It is caused by a failure in one of the elements that heat the oxygen sensors, specifically bank 1 sensor 2, which is downstream from the catalytic converter. It technically stands for: The purpose of the heated element in the oxygen sensor … Read more

Hyundai Equus P0457: EVAP System – Leak Detected

P0457 is a somewhat common trouble code with the Hyundai Equus. This code references a number that is given to you when you plug your Equus into a OBDII scanner. P0457 Indicates that there is a leak in the Evaporative Emission Control (EVAP) System. It is similar to P0455 (large leak) and P0456 (small leak) … Read more

Hyundai Equus P0456: Meaning, Causes, How to Fix

One of the most common trouble codes with the Hyundai Equus is the P0456 code. This trouble code references a number that is given to you when you plug your Equus into an OBDII scanner. P0456 Indicates that there is a small leak in the evaporative emission control system. It often appears with or is … Read more

Hyundai Equus P0442 Engine Code: Causes + How to Fix

One of the most common issues that happens with the Hyundai Equus is the P0442 trouble code. This code appears when connecting the vehicle to an OBDII scanner and pertains to the emissions system.  While it’s unlikely to cause a breakdown, it can be bothersome and may result in a failed emissions test for your … Read more

Hyundai Equus P0441: Meaning, Causes, How to Fix

P0441 is one of the more common OBD II codes that can occur in the Hyundai Equus.  It is frequently caused by a loose or bad gas cap, cracked or disconnected EVAP system hoses, vacuum leaks, or a bad purge valve. Always start by taking a look at the gas cap. P0441 is related to … Read more