U01B0 Diagnostic Trouble Code

U01B0 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 U01B0 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Faulty IMRC actuator/sensor

Repair Processes :

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. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code U01B0 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 U01B0.

Fortunately, U01B0 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U01B0 Trouble Code For Specific Cars

U01B0 Perry 8 Dual Alternator Lower Fault/ Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
U01B0 Aero Type 30 ABS Outlet Valve Coil LR Circuit Failure
U01B0 Ferrari F310 Intermediate Shaft Speed Sensor Circuit No signal
U01B0 Daewoo Joyster Gate Select Actuator Circuit / Open [left / right motion]
U01B0 Mitsubishi Sss Auxillary Speed Sensor Fault
U01B0 Lamborghini Countach Shift Time Error
U01B0 Reliant Se7 Gate Select Position Circuit Intermittent