P0125 is a generic OBD-II code. If your Hummer H1 has registered it, means that the ECM/PCM is getting a signal from the engine coolant temperature sensor (ECT) that the engine is not warm enough to enter closed loop fuel control. P0125 is usually caused by a bad thermostat, low coolant, or a bad ECT … Read more
P0191 is a common OBD-II code. It indicates that the fuel rail pressure sensor is receiving a signal that is outside of its normal range. This is a generic code, which indicates that it has the same meaning for the Hummer H1 as it would any other vehicle. P0191 is typically caused … Read more
P0123 is a relatively common OBD-II code. It’s generic, which means it has the same meaning for the Hummer H1 as it would any other vehicle. It’s an OBDII code that references issues with the Throttle Position Sensor (TPS). It is relatively serious problem since it can leave your vehicle stranded or severely limited. The … Read more
P0332 is a powertrain related OBD-II trouble code. It has the same meaning for the Hummer H1 as it would any other vehicle. By definition, P0332 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range from the knock sensor (Sensor 2 | Bank 2). Clearing this code … Read more
P0327 is a powertrain related OBD-II trouble code. It has the same meaning for the Hummer H1 as it would any other vehicle. By definition, P0327 means that the vehicles ECM/PCM is getting a signal that is lower than the defined operational range. Clearing this code typically requires a new knock sensor or correcting … Read more
Your Hummer H1’s door ajar message can help you get a door all the way closed when you otherwise wouldn’t notice when it was open. Over the life of the vehicle, it is possible for the door ajar warning to stay on even when the doors are, in fact, not ajar. The door … Read more
Transmissions are an integral part of any vehicle, and overheating can lead to costly repairs or even permanent damage. Hummer H1 owners should be aware of the common symptoms and causes of transmission overheating to prevent potential issues and ensure their trucks remain strong and reliable. In this article, we will discuss the common causes … Read more
When you start your Hummer H1, the OBD-II system runs a self diagnostic check on all major systems. If any of these checks fail, you will see a diagnostic warning light on the dash for the corresponding system. When the SRS system fails this check, you’ll see the SRS light. SRS stands for supplemental … Read more
P1682 is a diagnostic trouble code that indicates that your Hummer H1’s ignition switch is having a voltage problem. It is typically caused by a faulty ignition switch, although there can be other causes as well. There are two “circuits” to the ignition switch. The first one goes to the ECM through the throttle … Read more
A leaking radiator in a Hummer H1 can cause your vehicle to overheat and cause expensive engine damage if not addressed promptly. Ignoring a leaking radiator can potentially lead to serious long-term damage, such as a bad head gasket or a cracked head, so it is important to take your Hummer H1 to a mechanic … Read more