SOURCE: Audi A3 2002 model auto - temperature gauge not working
How do I locate the sensor on a 2003 A4 1.8L? I see a blue sensor on the right by the firewall, and a green sensor on the left nearer to the battery on the left. Is it possible that I already have a green sensor in my car?
SOURCE: camshaft sensor
Do you know if the engine timing is correct? If you get the timing a tooth out you very similar issues, has the cambelt been replaced recently - or is it over due??
Another posibility is the cam chain adjuster. This is oil pressure fed and I think controled by a solnoid, it applies a force between the chain that drives the inlet camshaft from the cambelt driven exhaust camshaft. (Making any sense? Let me know if you want me to simplify) This operating correctly advances and retards the valve timing, when faulty it can make it incorrect. Non start is a fault caused, but more often they become very noisey.
The cam chain adjuster is fed oil when the car is started, you can breifly here it before it has reached operating pressure on normal start up, sounds like a diesel knock for a second, then goes, this is normal. If it continues, its more than likely faulty.
Let me know if you want any more info. If the sensor and wiring is good you'll probably have a timing issue.
SOURCE: Camshaft position sensor replacement for 2002 Audi A4
its not hard to fix.but you going to have to move some things to get to it. you will need a haynes repair manual.it will show you photos and instructions how to replace it.
SOURCE: i have same problem on my (Audi A4 3.0L)
try somethng simple. change fuel filter. add can of SEAFOAM to tank of PREMIUM gas. allow to idle for 3-5 min. drive hard for 10 minutes. get Zone or Advance to cut off light. go 30 miles. change fuel filter again. this is a case of Ethanol gas syndrome. it causes oxy readings ff the scale; carbonizes fuel,emission, and engine internals, try this first. add SEAFOAM every 3-5000 miles to clean this waer and goop out and see how it works. also, you might be able to clean oxy sensors or replace them.
SOURCE: AUDI A3 intake flag motor
I had the exact same problem. The check engine light would come on then go off. I didn't notice any drivabiltiy issues. End the end I had to replace the flapper motor, the high pressure fuel pump and the camshaft. They showed me the old parts and sure enough the camshaft lobe was worn down and the cam follower that actuates the fuel pump was in pieces. Needless to say it was very expensive. It's been a problem posted on many Audi sites. I went ahead and had the timing belt changed. Now she's as good as new.
P0010....'A' Camshaft Position Actuator Circuit (Bank 1)
P0011....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
P0012....'A' Camshaft Position - Timing Over-Retarded (Bank 1)
P0013....'B' Camshaft Position - Actuator Circuit (Bank 1)
P0014....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
P0015....'B' Camshaft Position -Timing Over-Retarded (Bank 1)
P0020....'A' Camshaft Position Actuator Circuit (Bank 2)
P0021....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)
P0022....'A' Camshaft Position - Timing Over-Retarded (Bank 2)
P0023....'B' Camshaft Position - Actuator Circuit (Bank 2)
P0024....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)
P0025....'B' Camshaft Position - Timing Over-Retarded (Bank 2)
I think your sensors are pattern parts and the readings /resistances are not the same as the original parts ,try some bosch units is my first suggestion ,
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