U2899 Diagnostic Trouble Code

U2899 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 U2899 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 :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
An air leak forward of the DPF will change the sensor readings resulting in the code

Repair Processes :

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. 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. If all testing has passed so far yet you still have the same code, check your scan tool and see if it can open and close the IMRC valve.

Process Tips

Diagnostic trouble code U2899 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 U2899.

Fortunately, U2899 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U2899 Trouble Code For Specific Cars

U2899 Mazda Rx-7 A Camshaft Position - Timing Over-Retarded (Bank 2)
U2899 Franklin Airman Neutral Switch Circuit Malfunction
U2899 Lagonda 11.9 Shift Solenoid C Stuck On
U2899 Siata Spring Intake Air Volume Circuit Malfunction
U2899 Chrysler Tc Exhaust Not Warm, Downstream O2 Sensor
U2899 Dacia Logan Fuel Temperature Sensor A Circuit low Input
U2899 Abc Sports A/C Refrigerant Pressure Sensor Circuit Low Input