U0274 Diagnostic Trouble Code

U0274 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 U0274 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.
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 :

Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. 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 U0274 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 U0274.

Fortunately, U0274 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0274 Trouble Code For Specific Cars

U0274 Willys-overland 475 SCP (J1850) Invalid or Missing Data for Personalization (Memory) Features
U0274 Jordan J Seat Front Vertical Motor Memory Position Out of Range
U0274 Artega Gt Air Suspension Rear Pneumatic Failure
U0274 Ariel Atom Air Suspension LR Air Spring/Shock Solenoid Output Circuit Short To Ground
U0274 Ford Racing Mirror Passenger Horizontal Switch Circuit Short To Battery
U0274 Hispano Suiza Barcelona Pedal Correlation PDS2 and HPDS
U0274 Dome Zero Ignition Tamper Circuit Open