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 Tc Air Suspension Compressor Relay Circuit Short To Battery
P1927 Sunbeam 10 MAF Sensor Intermittent/ Check of all OBDII Systems Not Complete
P1927 Alpine A310 Air Bag passenger Circuit Open - Loop #2
P1927 Mazda Sport A/C Cycling Period Too Short
P1927 Ferrari 255 Input/Turbine Speed Sensor Circuit Malfunction
P1927 Renault Fuego Glow Plug Circuit High Input (Bank #2)
P1927 Renault Scenic 4 High Mount Stop Lamp Circuit Failure