Why did my VW Jetta fail smog check?
Sounds like your VW Jetta failed the smog check because the Secondary Air Injection Monitor was not “ready” or complete. It should be noted that the secondary air injection monitor which checks for the performance of the air pump runs mainly when the engine is cold.
Why is my secondary air injection pump not working?
A fuse or relay for the secondary air injection pump may be faulty A leak in the hoses/piping between the secondary air injection pump and the Combi or secondary air injection A sensor for the secondary air pressure may be faulty The secondary air injection port in the cylinder head may be plugged with carbon
What to do if your VW Jetta fails air injection?
In this particular case if your driving for 700 included at least 3 cold-starts we’d recommend either following the VW drive cycle we indicate below or seek assistance from a VW dealership or equipped smog station for a diagnosis of your VW’s on-board diagnostics system.
What makes a VW Jetta a cold start?
Step 1: Cold Start — The ECM determines the presence of a cold start by comparing the engine coolant temperature to the ambient air temperature during startup. The engine is considered cold when: • Engine coolant temperature is below 122°F. • Engine coolant and intake air temperatures are within 11°F of each other at startup.
When to replace a secondary air injection pump?
If you’ve already experienced engine stalling, poor acceleration, and a check engine warning light, then you need to have the secondary air injection pump checked out immediately. If it is proven to be the problem, have it replaced by a certified mechanic.
What kind of problem does a 2005 VW Jetta have?
The contact owns a 2005 Volkswagen Jetta. While driving approximately 40 mph, an abnormal sound emitted from the engine compartment and the vehicle shut off as the check engine warning light illuminated. The vehicle failed to restart. The vehicle was towed to a dealer for diagnostic testing.
Where did the 2005 VW Jetta catch fire?
The contact owned a 2005 Volkswagen Jetta. The contact stated that the vehicle suddenly caught fire, while idled in a drive thru line at a fast food restaurant. The fire started under the hood.
What do I need to know about my VW Jetta?
A specialized VW scan tool can report the condition of each emission sensor and actuator required for emission monitoring. Take extra caution when performing the drive cycle on public roadways. If you feel you may be unable to perform the drive cycle safely, please seek assistance. The VW OBD-II drive cycle is an eight-step process.
When to do a cold start on a VW Jetta?
With that said, it’s not the number of miles you drive that sets off the air injection monitor, rather the number of cold starts. A cold start is considered starting the engine after the vehicle has sat for at least 8 hours. Since the air injection monitor takes into effect ambient air temperate, it is best to perform a cold start in the mornings.
What should I do if my Jetta misfire?
During this period, the O2S heater, misfire, AIR, fuel system, and EVAP monitors run. Step 2: Idle 2 1/2 Minutes — Turn the air conditioning (A/C) and headlights on to help the misfire monitor—the additional electrical loads help even out combustion pulses.