P1139 Diagnostic Trouble Code

P1139 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 P1139 diagnostic trouble code may include:

Corroded or damaged connector
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Lack of power
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
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.

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 P1139 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 P1139.

Fortunately, P1139 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1139 Trouble Code For Specific Cars

P1139 Citroen Ds4 Fuel Level Sensor B Circuit Malfunction
P1139 Bitter Sc Brake Pedal Switch Circuit Malfunction
P1139 Mazda Grand TSS Circuit Intermittent Malfunction
P1139 Volvo 66
P1139 Nissan C 52 Climate Control Temperature Differential Circuit Open
P1139 Mercury Montego Air Suspension Rear Height Sensor Low Signal Circuit Open
P1139 Mini Iv ASM Control Circuit Range/Performance