P2620 Diagnostic Trouble Code

P2620 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 P2620 diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.

Repair Processes :

If you find a related TSB, the information will often help in diagnosing the code in question as TSBs are crested from many thousands of repairs. 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.

Process Tips

Diagnostic trouble code P2620 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 P2620.

Fortunately, P2620 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2620 Trouble Code For Specific Cars

P2620 Ferrari 625 Intake Valve Control Solenoid Circuit Low (Bank 1)
P2620 Mahindra Commander Traction Control Valve Rear Circuit Short To Battery
P2620 Wiesmann Roadster
P2620 Sunbeam-talbot 4-litre Mass or Volume Air Flow Circuit low Input
P2620 Toyota Aygo O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
P2620 Jeep Wrangler Seat Driver Recline Forward Circuit Open
P2620 Bugatti Type 251 Cylinder 1 Injector Circuit Low