U3288 Diagnostic Trouble Code

U3288 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 U3288 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.
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 :

A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
Faulty IMRC actuator/sensor
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble. 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 U3288 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 U3288.

Fortunately, U3288 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U3288 Trouble Code For Specific Cars

U3288 Mercedes Slk 300 Air Bag Diagnostic Monitor Ground Circuit Short To Ground
U3288 Aston Martin 2-litres Air Suspension RF Height Sensor Circuit Open
U3288 Alfa Romeo 4c Accelerometer Front Circuit Failure
U3288 Jaguar Xk8 Seat Driver Occupied Switch Circuit Short To Battery
U3288 Gardner 8-a O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)
U3288 Goliath 1100 Passenger Door Ajar Circuit Short To Battery
U3288 Chrysler Chronos Engine RPM Or Speed Limiter Reached