P029B Trouble Code

View P029B obd/2 error code description and symptoms. P029B engine photo

Catalytic converters must be warm before they can work properly. On a cold start the PCM provides a rich mixture to keep the cold engine running.
All that extra fuel goes into the catalytic converter. But the exhaust isn't very hot, because, ah, the engine is pretty cold. GM has employed several strategies to fire up the catalytic converter quicker and reduce cold start emissions. One way is to use a secondary air pump that pumps outside air directly into the catalytic converter.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

Difficulty Level (Expert)
Level
Repair Time (35 Min.)
Time
Cost Prediction : $ 30-110

P029B Error Code Repair Process :

When you turn on the ignition, the Service Engine Soon or Check Engine P029B light should flash briefly, indicating that the OBD system is ready to scan your vehicle for any malfunctions. After this brief flash, the light should stay off while you drive as long as no problems are detected. If evaporative emission control system vent control circuit malfunction so, you'll be glad to know that your vehicle is equipped with an early warning system that could save you time, money, and fuel in addition to helping protect the evaporative emission control system vent control circuit malfunction.

Wrench Tool P029B is a kind of Powertrain Trouble Code

Powertrain of a modern automobile, comprising engine (with exhaust system), transmission, drive shaft, suspension and the wheels. In a motor vehicle, the term powertrain or powerplant describes the main components that generate power and deliver it to the road surface, water, or air.

Common Causes of P029B

A common cause of code P029B is the failure of Evaporative Emission Control System Vent Control Circuit Malfunction, but there are several other possible causes as well, such as ;

P029B code for all cars

You can view according P029B DTC for your car model. We selected several models to see obd2 solutions click and view it.

+P029B Dkw-vemag Vemag-fissore +P029B Hrg 1.5 Litre +P029B American Tourist +P029B Mini Iii +P029B Diva Gt

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