P0855 Diagnostic Trouble Code

P0855 is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a P0855 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Rich or lean exhaust

Possible Causes :

The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Fuel with a large percentage of sulfur will clog the DPF quickly
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P0855 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P0855.

Fortunately, P0855 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0855 Trouble Code For Specific Cars

P0855 Opel Meriva Door Ajar Circuit Short To Battery
P0855 Subaru Baja Left Front Center Sensor Circuit Fault
P0855 Triumph Bonneville 1200 Passenger's Seat Forward Switch Circuit Short to Battery
P0855 Nissan Sut Current Sense Circuit Failure
P0855 Maserati Quatroporte Transmission Fluid Temperature Sensor Circuit High Input
P0855 Volkswagen Passat B6 Right Rear Turn Lamp Circuit Failure
P0855 Ansaldo 4cs Air Suspension LF Height Sensor Circuit Open