P16C4 Diagnostic Trouble Code

P16C4 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 P16C4 diagnostic trouble code may include:

Malfunction Indicator Lamp (MIL) illuminated
Carbon Buildup on O2 Sensor
Poor fuel economy
Diminished fuel efficiency

Possible Causes :

Faulty IMRC actuator/sensor
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Look for damage to the tank indicating impact that may have damaged the fuel pump or sender.

Process Tips

Diagnostic trouble code P16C4 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 P16C4.

Fortunately, P16C4 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P16C4 Trouble Code For Specific Cars

P16C4 Rover 14 Idle Control System RPM lower Than Expected
P16C4 Brutsch Bussard Cruise Control On Signal Malfunction
P16C4 Tvr Trident Power Steering Pressure sensor Circuit Intermittent
P16C4 Triumph Dove Passenger's Seatback Autoglide Forward Switch Circuit Short to Ground
P16C4 Aston Martin 15 Air Suspension RF Corner Up Timeout
P16C4 Fiat 8 Hp Lamp Dome Input Circuit Short To Battery
P16C4 Asl Garaiya Air Suspension RF Air Spring Solenoid Output Circuit Short To Battery