P146F Diagnostic Trouble Code

P146F 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 P146F 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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition. If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs.

Process Tips

Diagnostic trouble code P146F 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 P146F.

Fortunately, P146F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P146F Trouble Code For Specific Cars

P146F Fiat 147 Lack Of HO2S Switch - Sensor Indicates Lean
P146F Ambassador Custom Air Suspension Front Compressor Relay Circuit Short To Ground
P146F Bmw Z4 Column Tilt Feedback Potentiometer Circuit Short to Battery
P146F Bugatti Type 22 Cylinder 1 Contribution/Balance Fault
P146F Mazda Mazda 6 Turbocharger Boost Sensor A Circuit High
P146F Mitsubishi Field Guard Autolamp Delay Decrease Circuit Short To Battery
P146F Hyundai Santa