P1934 Diagnostic Trouble Code

P1934 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 P1934 diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
Diminished fuel efficiency

Possible Causes :

The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Defective ECU strategies or components will prevent proper regeneration
Dirty air cleaner element Damaged DPF

Repair Processes :

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. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code P1934 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 P1934.

Fortunately, P1934 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1934 Trouble Code For Specific Cars

P1934 Lancia 2000 Speed Wheel Rear Input Signal Missing
P1934 Mercedes E 400 Acceleration Position Sensor Conflict
P1934 Porsche 911 Type 997 Fuel Composition Sensor Circuit High Input
P1934 Skoda 1201 Key Line Voltage
P1934 Datsun Pulsar HO2S Heater Control Circuit (Bank 2 Sensor 3)
P1934 Volkswagen Ecoracer RF PARK LAMP OUTPUT CIRCUIT Short to Battery
P1934 Gordon-keeble Gk Passenger Door Disarm Switch ckt Short to Ground