Camshaft sensor I have a Audi A3 2001 Been having a long term problem with my camshaft sensor a new sensor has been fitted, but the test results keep coming up with sensor position intermittent. It has a hard start and never starts first time. I spent so much money trying to fix this problem....need help its doing my head in!

REPLACE NOX SENSOR BEHIND CATALYST...

code p 1340 refers to crank position sensor and camshaft position sensor signals out of sequence
the results of the pretest smog test at 2400 rpm suggest that the cam advance solenoid or system is failing
that will alter the sequence of the signals resulting in the code and failing of the smog test
as to answer you question , I am not convinced at this point but I consider the cam advance system to be at fault and would be testing in that area

The crank shaft position sensor is to tell the cpu when to allow spark at the right time. IT normally works or it doesn't. Lack of take power for take off can be associated with low fuel pressure for the injectors and MAF/MAF sensor faults.. have a pressure test done on the fuel system to check for regulator failure.

Hi Rm. Your problem is with the air fuel mixture control. Carry out an inspection to see if there are any broken intake ducts or broken, cracked or loose fitting vacuum tubes. A defective knock sensor, camshaft or crankshaft pick up sensor could result in your code, but would usually record as a fault on the read out, as would the lambda and oxygen sensors, so have a look for air leaking into the manifold. Regards John

You would need to find a test for the cam sensors, could also be the rpm sensor.

Definition of Diagnostic Trouble Code P1346 Audi: Ignition Coil Power Output Stage 3 Short to B+ BMW: Misfire During Start Cylinder 3 Buick: Intake Camshaft Position [CMP] Sensor System Performance Cadillac: Intake Camshaft Position [CMP] Sensor System Performance Chevrolet: Intake Camshaft Position [CMP] Sensor System Performance Ford: Fuel Level Sensor B Circuit GMC: Intake Camshaft Position [CMP] Sensor System Performance Lexus: VVT Sensor Rang/Performance Problem (Bank 1) Lincoln: Fuel Level Sensor B Circuit Mazda: Fuel Level Sensor B Circuit Mercury: Fuel Level Sensor B Circuit Oldsmobile: Intake Camshaft Position [CMP] Sensor System Performance Pontiac: Intake Camshaft Position [CMP] Sensor System Performance Saturn: Intake Camshaft Position [CMP] Sensor System Performance Toyota: VVT Sensor /Camshaft Position Sensor Circuit Range/ Performance Problem (Bank 1) Volkswagen: Ignition Coil Power Output Stage 3 Short to B+

Hi, the 1.8 engine doesn't have one fitted. It has crankshaft and camshaft position sensors and an engine control unit (ECU) to fire the individual ignition coils mounted on each spark plug.
Hope that helps Matt...

Needs to be reset with a scan tool.

You mentioned a non genuine cat being fitted. That in itself is not too much of a problem, however, non genuine oxygen sensors are. There is a huge difference in quality between the genuine article and cheep alternatives on the after market. I very much suspect your fault code has been tripped by such a replacement part. Exceptionally complex engine management control systems just cant recognise the electronic info thats being sent by non-gen sensors, so its a false economy to fit these. Also one thing to bear in mind for the future is to avoid using super market fuels. Its a common belief that all fuels are the same and it all comes from the same tankers, etc etc. This is absolute rubbish. Its like comparing a 20 year old single malt Scottish Whiskey with a Happy Shopper bargain blend. It may look the same, but there's simply no comparison. Prolonged use of these cheep fuels will produce long term running problems. Also dont forget, there are pre and post catalytic converter oxygen sensors on your car, so the bills can get expensive. Good luck

Don't do this on an Audi. They have used a recirc valve because the mass-airflow metering system on the car is telling the engine that a certain amount of air is coming, and the engine is being fueled accordingly. If you use a blowoff valve to purge excess boost air to the atmosphere, the engine will still be expecting to see this air and will be fueling accordingly, and you'll get a rich spike every time you shift. This rich spiking has been proven MANY times to degrade and eventually clog/ruin the catalytic converter and O2 sensors. Some mass-air metered cars (less precise cars in terms of engine management) are fine when DVs are replaced with BOVs, but not Audi/VW cars - using an atmospheric dump will destroy your cat and O2 sensors (plan on $1500+ to fix this).