Opel Signum Leaking Heater Core Diagnosis

One of the most common problems that can happen to a vehicle is a heater core leak.  If your Opel Signum has a leaking heater core, it is not a breakdown risk.  Although, it is necessary to make sure that the lost coolant is replaced.  It can cause damage to the vehicle in other ways, … Read more

Opel Signum Bad Starter → Symptoms & Diagnosis

  One of the most common problems that can occur in the life of a vehicle is a bad starter, that includes the Opel Signum.  It is important to determine whether or not it’s a bad starter that is keeping the vehicle from turning over. If your Signum is not starting, don’t assume right away … Read more

Opel Signum: P0720 → OSS Circuit → Malfunction

P0720 is a generic OBD II trouble code, which means that it has the same meaning for your Opel Signum as it would any other vehicle.  It indicates that your Signum’s OSS (Output Shaft Speed Sensor) is reporting a malfunction. It’s typically caused by a bad OSS, or a wiring problem. The OSS works by … Read more

Opel Signum P0520: Oil Pressure Switch/Sensor → Circuit

  P0520 is a common OBD2 trouble code.  It’s generic, which means that it has the same meaning for the Opel Signum as it would any other vehicle.  P0520 indicates that the oil pressure sensor is operating outside of its normal “range”.  It is typically caused by a bad oil pressure sensor switch or a … Read more

Opel Signum P0108:  MAP Barometric Sensor → High Input 

  P0108 is a generic OBD-II trouble code.  It indicates your Opel Signum’s MAP (manifold absolute pressure) sensor’s voltage reading is outside of the normal operating range.  The voltage is too high.  It’s most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming into … Read more

Opel Signum P0443 Code: Meaning, Causes, How To Fix

P0443 is a very common OBD2 code.  It’s generic, meaning it has the same definition for the Opel Signum as any other vehicle.   If your Signum has this code, it indicates the EVAP purge control valve circuit is malfunctioning. This is typically caused by a short in the wiring to or from the purge … Read more

Opel Signum: P0562 – System Voltage Low

P0562 is a common OBD-II trouble code.  It’s a general code, which means that it means the same thing for any vehicle, including the Opel Signum.  P0562 indicates that the system voltage is below 10 volts for a solid minute.  With the engine running, the system voltage should be 14.1-14.4 volts, and it’s typically caused … Read more

Opel Signum:  Signs of a Bad Water Pump

Your Opel Signum’s water pump is one of the most crucial parts of the engine.  If it doesn’t pump water through the engine, it’s going to overheat and do a lot of damage.  Typical signs of a bad water pump include overheating, white smoke, a bad smell, rough idle, and more. A water pump works … Read more

Opel Signum: Running Hot → Causes

If your Opel Signum is running hot, it is a serious problem.  If it gets too hot, it leads to overheating.  A hot engine is usually caused by a few different things, such as the thermostat, water pump, radiator, or outside conditions.     Opel Signum Running Hot Symptoms Obviously, the main symptom of running … Read more