P2101 Diagnostic Trouble Code

P2101 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 P2101 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
Engine surge

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.
Faulty IMRC actuator/sensor

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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.

Process Tips

Diagnostic trouble code P2101 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 P2101.

Fortunately, P2101 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P2101 Trouble Code For Specific Cars

P2101 Perry 11.9 Dual Alternator Lower Circuit Malfunction/ Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
P2101 Pontiac Stinger Floor Temperature Switch Circuit Malfunction
P2101 Abarth Otr 1000 A/C Post Heater Sensor Circuit Failure
P2101 Renault Megane 4 Heated Backlite Relay Circuit Failure
P2101 Mercedes-benz Cls Class Air Suspension Compressor Relay Circuit Open
P2101 Mercedes Cls 63 ABS Outlet Valve Coil RR Circuit Short To Battery
P2101 Chevrolet Equinox 3 Driver's Seat Seatback Autoglide Forward Switch Circuit Short to Ground