P1ADD Diagnostic Trouble Code

P1ADD 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 P1ADD diagnostic trouble code may include:

Vacuum leak on the engine
Reduction in engine performance, especially at low RPM levels
Engine surge
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.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data.

Process Tips

Diagnostic trouble code P1ADD 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 P1ADD.

Fortunately, P1ADD is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1ADD Trouble Code For Specific Cars

P1ADD Triumph Roadster PATS Transceiver Module Signal Is Not Received
P1ADD Wolseley Hornet SCP (J1850) Invalid or Missing Data for Suspension
P1ADD Porsche Rsk Fuel Pump Speed Primary Circuit Malfunction
P1ADD Citroen Gs Fuel Level Sensor Circuit Range/Performance
P1ADD Riley Redwing Hydraulic Fluid Pressure/ Flow Circuit Failure
P1ADD Alfa Romeo Montreal Air Bag Crash Sensor #1 Ground Circuit Open
P1ADD Packard Twelve Driver Door Handle Circuit Short To Battery