U029E Diagnostic Trouble Code

U029E 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 U029E diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
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.
A plugged converter will cause of host of driveability problems as well as set this code. A severely plugged converter will result in the inability to increase rpm when under load. Look for a code such as P0421 -- catalytic converter efficiency below threshold if the converter indicating a faulty converter.

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. 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. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code U029E 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 U029E.

Fortunately, U029E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U029E Trouble Code For Specific Cars

U029E Opel Cd Decklid Punch-Out Sensor Battery Short
U029E Honda S600 Rear Wiper Select Switch "E" Short to Ground
U029E Ford E-250 Manifold Absolute Temperature Circuit High Input
U029E Lexus Minority Report Temperature Select Failure
U029E Gaz 29 O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)
U029E Ferrari Scuderia Keyless Entry Circuit Failure
U029E Fiat Grande Punto Lamp Turn Signal Front Output Circuit Failure