Question about 2002 Volkswagen Eurovan

1 Answer

Check engine light is on - 3 codes 17748,17573,17755. Fuel mileage is down significantly, as is engine power

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.


    An expert whose answer got voted for 20 times.

  • Expert
  • 138 Answers

17748 camshaft sensor and crankshaft sensor incorrect correlation [bank 1]. Valve timing is most probably incorrectly set. 17573 Rich mixture. Can be caused by high fuel pressure. -Faulty Lambda Probes. - Blockage in exhaust system[ loose baffles] - Blockage in inlet[clogged air filter] Petrol tank breather system [faulty canister purge valve]. 17755 same as 17748 but bank two. Check valve timing, Fuel pressure and for loose baffles in exhaust system.

Posted on Jun 03, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2005 VW Beetle. Engne light on and EPC light comes on with significantly reduced power.

Sounds like all those sensors are going to need replaced. Basically, they are all in charge of metering the air and fuel to the engine, so if they are malfunctioning, the car isn't going to run correctly.

Apr 16, 2014 | 2001 Volkswagen Beetle

1 Answer

2004 GMC Canyon fuel mileage issues?

If the check engine light is on, you would need to get the codes. If not, it depends on how bad the mileage is.
Very few things could affect mileage and not make the check engine light come on.
How bad is it, and how long have you noticed a difference ?

Aug 22, 2012 | GMC Cars & Trucks

1 Answer

Just bought ford fiesta finesse 16 valve 03 1.2 am doing roughly 21mpg no leaks or drips this is round town and on motor way have not taken it above 65


As far as the review says the mileage should not falter since it is new as you said. However

These are the causes of a poor mileage in a car:-

Poorly Inflated Car Tires

Car tires that are improperly inflated create significant road resistance and drag on a moving car. A car engine has to work harder to propel a car forward due to this increased tire/road resistance. This resistance chips away at a car's gas mileage.

Dirty Air Filter

A dirty air filter impedes air flow into a car's engine, a process that disrupts normal engine combustion and makes it less efficient. This causes a reduction in both engine performance and gas mileage.

Bad Spark Plugs

Spark plugs are responsible for igniting a car's air/fuel mixture, an event that causes a mini explosion inside a car's engine cylinders. Bad or dysfunctional spark plugs don't fire, or ignite, properly; thus, they affect engine combustion negatively, which in turn negatively affects gas mileage.

Bad Oxygen Sensors

For a car to be at its most fuel efficient, its oxygen sensors, small and electronically operated, automatically adjust a car's air/fuel mixture and have to be functioning properly. Bad oxygen sensors cause abnormal air/fuel mixture ratios, a condition that results in poor gas mileage and poor vehicle performance.

Leaky Fuel Injectors

A car's fuel injection system is responsible for injecting precise amounts of fuel into a car's engine cylinders, where it is combined with air and ignited. For a car to perform properly, a specific amount of fuel has to be injected by each fuel injector into each engine cylinder. A leaky fuel injector wastes fuel by leaking it outside the engine and reducing the amount of fuel that makes it into the engine. This results in wasted fuel and reduced gas mileage.
It is suggested to start with a code scanner to find out if there are any stored fault codes in your car.

Also check this link for some helpful tips:-

Please get back to us if you have further query else please accept the suggestion.
Thank you for contacting

Jul 18, 2011 | Ford Fiesta Cars & Trucks

1 Answer

High mileage car. Low quality Kenyan fuel. Low on

High on mileage means that the engine has done a lot of work, possible that the compression is down, need to check if this is below level, if there is oil used in excess then the engine needs an overhauling subject to the cost estimated.

Cant compromise on bad fuel as this will bring down the power of the engine.
High fule consumption means poor setting so fuel and ignition , check fuel settings- pump calibration and timing.

Mar 11, 2011 | 1997 Toyota Corolla

1 Answer

O2 senor rear how do u change it)?

O2 sensors normally don't require replacement to stop getting an O2 sensor code even on a 13 year old vehicle. They are an "indicator" to notify you that something is wrong. If the rear O2 sensor is causing a MIL light (idiot or engine light) you should check for an exhaust leak first (most common cause). If there is no exhaust leak before the sensor and the motor is running nearly perfectly with no bogging down in power and no loss of fuel mileage you can expect that the catalytic converter may be starting to fail and you are getting an incorrect exhaust mixture after the CAT. If that isn't the problem just try "swapping" a used O2 sensor from a junk yard before you spend any significant money on the sensor itself.

Feb 09, 2011 | 1998 Ford Explorer

1 Answer

2000 dodge grand caravan 3.0 liter gas mileage has dropped significantly from 23mpg to 15mpg and van loses significant power when going up a grade and also does not accelerate properly.

If this happened over a short period of time. have the catalitic converters checked. They're clogged, insuffient air flow. Also check for codes. just because the light is not on doesn't mean there is not a code.

Feb 06, 2011 | 2000 Dodge Grand Caravan

2 Answers

My 2005 vw passat sedan is consuming too much fuel.fuel filters have been changed. could it be a problem from the control board?

Mileage can be affected by a multitude of things. Your driving habits will be the largest contributing factor but if those havent changed I would suggest the following:

Air filter replacement (k&n will get you more mileage)
plugs, wires, ignition coil (basic tune up stuff)
make sure the air pressure in your tires is correct
Make sure your calipers arent dragging on your rotors, this is probably not the case as I have rarely seen all four calipers drag at the same time, but if some are dragging more than others than this will increase wear and tear on your brake system and significantly lower your mileage.

If there are no check engine lights showing then I wouldnt think you have any sensor problems, but your o2 sensor can case your mileage to go down if its bad, but this should trip a trouble code.

I would not trust the on board computer to calculate your mileage either, there are too many variables for it to measure your mileage accurately. I would put a known amount of fuel in the car and reset your pedometer, drive normally and calculate your mileage manually before doing any tuneup. This will give you your mileage as your cars computer may be out of whack.

I average 33 mpg in my 07 passat automatic (by reading the onboard computer) on the highway. In town i get 22-26 depending on how I drive it. The mileage on this computer will fluctuate wildly when going up hills and down hills, during acceleration and braking, its just not an accurate measure of your mileage more like a guestamation by the vehicle.

Apr 08, 2010 | 2005 Volkswagen Passat

1 Answer

Burning alot of fuel 2001 chevy impala 3.4 engine. Check engine light on. recent tune up. 95,000 miles. Car also hesitates highway acceloration. Thank you. will have to check the code(s) stored in the computer.
The check engine light is telling have a problem and fixing that problem may help with your fuel mileage.
When the check engine light is loose 20% gas mileage and have 20% higher emissions.

Oct 19, 2009 | 2001 Chevrolet Impala

1 Answer

I use an extensive amount of diesel fuel in my 2007 F350 - can I disconnect the emission control device? Would it help?

I would not recommend disconnecting anything. This can void warranty and cause severe engine damage. There are several engine tuners or 'chips' as people call them that can increase performance and often times mileage too. They also will not void the manufacturer's warranty. Be sure there are no issues with you vehicle as of right now such as the check engine light being on or other driveability problems. Quality of fuel has also been known to significantly reduce mileage.

Sep 19, 2009 | 2004 Ford F150

1 Answer

05 mercury sable check engine po174

You has a vacuum leak on the engine.

In order to troubleshoot this, you must start with a clean engine wipe down.

The major offender parts are

air intake gasket on the manifold

air tube after the mass air flow sensor

rubber seal under idle air control IAC motor


Warm up the engine for 15-20 minutes (LEAVE THE engine at idle) then spray a little Barmen carburetor clear on the potential air leak location (ONE AT A TIME) and listen for a surge in rpm.

If the engine speed go higher that's mean the carburetor clean (ADDITIONAL FUEL) got into your engine and that's the gasket you need to change.

There may be multiple leaky spots so take your time and check all rubber gaskets,sensor and hose that are lead into the intake manifold.

When you finish fill up with one tank of Chervon to clean out the injectors.

Please post more information after your inspection.

Apr 12, 2009 | 2005 Mercury Sable

Not finding what you are looking for?
Cars & Trucks Logo

475 people viewed this question

Ask a Question

Usually answered in minutes!

Top Volkswagen Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers


Level 3 Expert

75817 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

8180 Answers

Are you a Volkswagen Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides