U215U Diagnostic Trouble Code

U215U 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 U215U 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.
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
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. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code U215U 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 U215U.

Fortunately, U215U is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U215U Trouble Code For Specific Cars

U215U Daihatsu D-compact Gear Shift Position Circuit [senses forward / rearward position, odd / even gears]
U215U Cadillac Allante Damper RR Circuit Open
U215U Vauxhall Movano Pressure Control Solenoid B Malfunction
U215U Mg X80 Ambient Air Temperature Sensor Circuit
U215U Isotta-fraschini Tipo
U215U Kia Shuma Secondary Air Injection System Switching Valve B Circuit Malfunction
U215U Studebaker Sky Hawk Lamp Warning Relay Circuit Short To Battery