P2794 Diagnostic Trouble Code

P2794 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 P2794 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Reduction in engine performance, especially at low RPM levels

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Look for damage to the tank indicating impact that may have damaged the fuel pump or sender. Look at the plug wires to make sure they are not burnt or laying on the exhaust. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications.

Process Tips

Diagnostic trouble code P2794 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 P2794.

Fortunately, P2794 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2794 Trouble Code For Specific Cars

P2794 Toyota Quantum Park Brake Switch # 2 Applied Circuit Failure
P2794 Chevrolet Hhr Dual Alternator Upper Fault
P2794 Pierce-arrow 48 Engine Oil Temperature Sensor Malfunction
P2794 Zagato Ferrari SCP (J1850) Invalid or Missing Data for Traction Control
P2794 Renault Espace 3 Gear Shift position short to ground
P2794 Rover Ccv Ignition Coil F Primary/Secondary Circuit Malfunction
P2794 Honda J-vx