Q: P0301 and P0411 codes on vw Passat 2003 1.8lt turbo

asked by on

Hi My car check engine light is on now it started blinking When the engine light is on car is shaking for 2 to 3 mins and running hard If I switch off the engine and start again the shaking goes again it comes after driving for 30 mins so and the light blinks and and car is shaking

What could be the problem please suggest

My car has 130000 miles.
My car has an automatic transmission.

Fault code P0301 is a misfire on cylinder # 1 and P0411 is a fault for Incorrect Secondary Air Injection.

Trouble code P0301 is most likely due to a faulty ignition coil. To verify before purchasing one, try swapping say cylinder #1 and #2 coils. Clear the faults then start the vehicle. If the fault changes to P0302, then the ignition coil is definitely faulty. Odds are if one coil is faulty, the others will not be far behind to fail.

To make life easier, change all 4 coils and plugs at the same time rather than dealing with a faulty coil every few months until they all fail. Correcting this issue may also clear the P0411 code. If it does not, then the hoses for the secondary air injection system should be checked for leaks, breaks, etc.

If you need assistance with this repair, consider YourMechanic, as one of our mobile technicians can come to your home and diagnose these trouble codes firsthand for an accurate repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. P0301 and P0411 codes on vw Passat 2003 1.8lt turbo

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I just replaced my Turn Signal Switch, signals stopped working, but my flashers work.

It is possible that you could be having an issue with the clock spring in your steering wheel. The clock spring controls a lot of the electronics that are mounted in the steering column and steering wheel itself. Many traction...

Q: 2002 vw passat. Car takes up to 10 attempts to start once it does finally start it runs fine, drives great no weird engine noises

The engine coolant temperature switch must be functioning to let the engine computer know that the car is cold and thus fuel injector pulse width must be greater to ease cold starts. If that switch is bad, that can account...

Q: Serpintine belt might be out? Car isn't starting.

Although the serpentine belt does power multiple components on your Cadillac Seville, the electrical gauges are not part on that list to my knowledge. The alternator, which is typically driven by the serpentine belt does power those parts however. My...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...