U02A2 Diagnostic Trouble Code

U02A2 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 U02A2 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 :

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. Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors.

Process Tips

Diagnostic trouble code U02A2 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 U02A2.

Fortunately, U02A2 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U02A2 Trouble Code For Specific Cars

U02A2 Ford C-max Loss of KAM Power; Open Circuit
U02A2 Ginetta G21 Oil Temperature Sensor Circuit Failure
U02A2 Morris Ten Four Cam Calibration Fault
U02A2 Oldsmobile Silhouette Damper LF Circuit Open
U02A2 Jeep Dakar Seat Driver Rear Up Switch Circuit Open
U02A2 Mazda Xedos 9 A/C Post Heater Sensor Circuit Failure
U02A2 Sunbeam-talbot 90 Mass or Volume Air flow Circuit Range/Performance Problem