P1927 Diagnostic Trouble Code

P1927 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 P1927 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P1927 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 P1927.

Fortunately, P1927 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1927 Trouble Code For Specific Cars

P1927 Alvis Fwd Air Bypass System
P1927 Maserati Gt Transmission Fluid Pressure Sensor/Switch D Circuit Range/Performance
P1927 Mercedes E 230 ABS Power Relay Coil Short Circuit To Battery
P1927 Ford Mercury Mirror Driver Vertical Feedback Potentiometer Circuit Short to Battery
P1927 Nissan Zaroot Cylinder 1 Injector Circuit High
P1927 Chery A1 Door Unlock Disarm Switch Circuit Short To Battery
P1927 Jaguar Xjr Seat Driver Occupied Input Circuit Short To Battery