U017F Diagnostic Trouble Code

U017F 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 U017F 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 :

A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
Some aftermarket accessories and performance modifications
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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code U017F 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 U017F.

Fortunately, U017F is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U017F Trouble Code For Specific Cars

U017F Rover 25 Ignition Coil - Cylinder 3 - Early Activation Fault
U017F Buckler 90 Cylinder #2 High To Low Side Open
U017F Fiat 503 Lamp Anti-Theft Indicator Circuit Short To Ground
U017F Subaru 360 Leakage Fault
U017F Lexus Is220 TCM Power Relay Sense Circuit
U017F Lanchester 40 Speed Fuel Pump Positive Feed Fault
U017F Porsche Gt2 Fuel Pump Resistor Switch Circuit Malfunction