U3248 Diagnostic Trouble Code

U3248 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 U3248 diagnostic trouble code may include:

Misfire
Misfire
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Reduction in engine performance, especially at low RPM levels

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.
Fuel with a large percentage of sulfur will clog the DPF quickly

Repair Processes :

Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. Pull the connectors apart and carefully look at the terminals (the metal parts) inside the connectors. 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. Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness.

Process Tips

Diagnostic trouble code U3248 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 U3248.

Fortunately, U3248 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U3248 Trouble Code For Specific Cars

U3248 Mercedes S 560 Air Assisted Injector Control Range/Performance
U3248 Fiat Grand Break Lamp Tail Output Circuit Short To Battery
U3248 Ford Zx2 Motor Temperature Out of Range
U3248 Ferrari 196 Injector High Side Open - Bank 1
U3248 Nissan Gloria Clutch Position Sensor Circuit Low Malfunction
U3248 Nsu Sports Cylinder 12 Injector Circuit Low
U3248 Bentley 8-litre Battery Power Relay Circuit Short To Battery