U1288 Diagnostic Trouble Code

U1288 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 U1288 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
Poor acceleration

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.
Faulty IMRC actuator relay (if equipped)

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. You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed.

Process Tips

Diagnostic trouble code U1288 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 U1288.

Fortunately, U1288 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U1288 Trouble Code For Specific Cars

U1288 Lancia Fulvia Speed Wheel Sensor Rear Center Input Short Circuit To Battery
U1288 Suzuki Escudo Metering Oil Pump Malfunction
U1288 Daimler Majestic Heated Backlite Input Circuit Short To Ground
U1288 Holden Vc Power Window RR Motor Circuit Open
U1288 Audi 50 Already Programmed (Test Mode DTC Only !!!)
U1288 Gobron 15 Park/Neutral Switch Circuit Failure
U1288 Acura Rl ABS Inlet Valve Coil LF Circuit Short To Ground