P16AA Diagnostic Trouble Code

P16AA 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 P16AA diagnostic trouble code may include:

Fuel pressure too high
Diminished fuel efficiency
Rich or lean exhaust
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

Fuel with a large percentage of sulfur will clog the DPF quickly
The Mass Airflow sensor will also cause this problem. Mass Airflow circuit malfunction.
Faulty IMRC actuator relay (if equipped)

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. 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. Now, clear the codes and test-drive the vehicle to see if the code is reset.

Process Tips

Diagnostic trouble code P16AA 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 P16AA.

Fortunately, P16AA is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P16AA Trouble Code For Specific Cars

P16AA Hotchkiss Torpedo Ride Control LR Shock Actuator Circuit Open
P16AA Vauxhall Agila Power Window RR Motor Circuit Failure
P16AA Renault Espace Gear Shift position short to battery
P16AA Daihatsu Applause Gear Shift Foward Actuator Circuit Low
P16AA Bugatti Type 30 Cylinder 1 Misfire Detected
P16AA Renault 17
P16AA Gaz M-21 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)