P2658 Diagnostic Trouble Code

P2658 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 P2658 diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Reduction in engine performance, especially at low RPM levels

Possible Causes :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

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. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code P2658 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 P2658.

Fortunately, P2658 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2658 Trouble Code For Specific Cars

P2658 Mercedes-benz 300 Air Bag Passenger Circuit Short to Ground - Loop #2
P2658 Renault Nepta Heated Backlite Relay Short To Battery
P2658 Tvr Tamora Power Steering Failure
P2658 Lotus 79 Torque Converter/Brake Switch B Circuit Low
P2658 Pontiac Piranha Fan Secondary Low with Low Fan On
P2658 Nissan Lafesta Cold Start Injector 1 Malfunction
P2658 Saab 900i Ignition Spare