U3552 Diagnostic Trouble Code

U3552 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 U3552 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.
Engine surge

Possible Causes :

Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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. 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.

Process Tips

Diagnostic trouble code U3552 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 U3552.

Fortunately, U3552 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U3552 Trouble Code For Specific Cars

U3552 Chevrolet Kodiak ECM/TCM Serial Communication Error
U3552 Seat Bolero Injector Circuit Open / Shorted - Cylinder #3
U3552 Honda Sm-x Remote Open/Close signal Circuit Short to Ground
U3552 Ford F150 Memory Set Switch Circuit Short To Battery
U3552 Toyota Passo P/ES Circuit Out Of Self Test Range
U3552 Aero Type 30 ABS Outlet Valve Coil LR Circuit Failure
U3552 Citroen 11 L Fan Relay (Low) Circuit Malfunction