P127D Diagnostic Trouble Code

P127D 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 P127D diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
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
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code P127D 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 P127D.

Fortunately, P127D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P127D Trouble Code For Specific Cars

P127D Nissan 110 Charging System Fault
P127D Hyundai Santa
P127D Hyundai Neos
P127D Wolseley 15
P127D Morgan Plus 4 Brake Fluid Level Sensor Input Short Circuit To Ground
P127D Renault Type A HO2S Heater Control Circuit Low (Bank 1 Sensor 3)
P127D Wanderer 5