P240A Diagnostic Trouble Code

P240A 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 P240A diagnostic trouble code may include:

Cherry red hot catalytic converter
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
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.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Now, clear the codes and test-drive the vehicle to see if the code is reset. 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. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code P240A 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 P240A.

Fortunately, P240A is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P240A Trouble Code For Specific Cars

P240A Volvo 850
P240A Toyota 1600 Needle Lift Sensor Malfunction
P240A Allard Lwb Air Bag Driver Circuit Resistance Low or Shorted Together
P240A Nissan 350z CID High
P240A Renault Logan Hazard Flash Output Circuit Short To Ground
P240A Austin 2200 Audio Tape Deck Unit is Not Responding
P240A British Salmson 20 Crankshaft Position Sensor B Circuit Range/Performance