P24B9 Diagnostic Trouble Code

P24B9 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 P24B9 diagnostic trouble code may include:

The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly
Faulty or damaged wiring
Hesitation upon acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
Defective ECU strategies or components will prevent proper regeneration

Repair Processes :

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector.

Process Tips

Diagnostic trouble code P24B9 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 P24B9.

Fortunately, P24B9 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P24B9 Trouble Code For Specific Cars

P24B9 Ds Ds 7 Ignition/Distributor Engine Speed Input Circuit No Signal
P24B9 Diva 10f IAC Monitor Disabled by PSP Switch Failed On
P24B9 Land Rover Series I Subsidiary Throttle Valve Solenoid Circuit Malfunction
P24B9 Kia Forte Seat Switch Reference Voltage Negative Common Open Circuit
P24B9 Ferrari 410 Intake Air Temperature Sensor 2 Circuit Low
P24B9 Mercedes A 140 AAI Circuit Malfunction
P24B9 Chevrolet Orlando EGRCHK Solenoid Circuit Malfunction