P0773 Diagnostic Trouble Code

P0773 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 P0773 diagnostic trouble code may include:

Engine surge
Blown fuse (if applicable)
Lack of power
Cherry red hot catalytic converter

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

Repair Processes :

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. Now, clear the codes and test-drive the vehicle to see if the code is reset. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code P0773 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 P0773.

Fortunately, P0773 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P0773 Trouble Code For Specific Cars

P0773 Arista Passy Air Suspension LR Corner Down Timeout
P0773 Renault Txe HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
P0773 Mercedes C 300 ABS Inlet Valve Coil LR Circuit Open
P0773 Audi Ur Audio Phone is Not Responding
P0773 Marcos Ugly Duckling Transmission 4-Wheel Drive Low Clutch Relay Circuit To Ground
P0773 Leyland Austin Theft Deterrent Fuel Enable Signal Not Received/ B+ Supply To VCRM A/C Circuit Malfunction
P0773 Talbot 150 Mirror Passenger Down Circuit Short To Ground