U0024 Diagnostic Trouble Code

U0024 is a kind of OBD-II Diagnostic U-Network 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 U0024 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
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

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
An air leak forward of the DPF will change the sensor readings resulting in the code

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. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code U0024 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 U0024.

Fortunately, U0024 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0024 Trouble Code For Specific Cars

U0024 Bentley Java Battery Saver Relay Coil Circuit Failure
U0024 Dodge R-ft Ignition Run/Start Circuit Short To Battery
U0024 Steyr 500 Lamp Seat Belt Circuit Short To Ground
U0024 Austin A125 Autolamp Delay Decrease Circuit Open
U0024 Ferrari Testarossa Keyless Entry Circuit Short To Battery
U0024 Mbm Coupe Tourism A/C Post Heater Sensor Circuit Short To Ground
U0024 Rover Mini Ignition Coil L Primary/Secondary Circuit Malfunction