P1103 Diagnostic Trouble Code

P1103 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 P1103 diagnostic trouble code may include:

Diminished fuel efficiency
Fuel pressure too high
Malfunction Indicator Lamp (MIL) illuminated
Rich or lean exhaust

Possible Causes :

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

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. If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for.

Process Tips

Diagnostic trouble code P1103 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 P1103.

Fortunately, P1103 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1103 Trouble Code For Specific Cars

P1103 Toyota Passo P/ES Circuit Out Of Self Test Range
P1103 Mercedes Slk Air Bag Crash Sensors #1 / #2 Circuit Short To Ground
P1103 Bristol 401 Cooling Fan Circuit Over Current
P1103 Infiniti Qx4
P1103 Alfa Romeo Sprint Air Bag Crash Sensor #2 Feed/Return Circuit Short To Ground
P1103 Volvo P210
P1103 Ford Equator Mass or Volume Air flow Circuit Malfunction