Question about 2002 Volkswagen Passat

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My vw passat has no power when it gets hot its a 1.6 petrol i tryed the air flow sencer and thats not the problim what els can it be ?

My passat has power when its hot until you turn it off and try to start it again it gets it hard to start and you have no power it like something is holding it back what can it be i tryed the air flow sencer and it did not fix it can anyone help please

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  • Volkswagen Master
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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems can and do cause many drive-ability related problem such as rough idle and other symptoms.


Posted on Oct 24, 2012

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Posted on Jan 02, 2017

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SOURCE: 2002 Passat won't start

We had the same problem. It was an expensive fix--there apparently was a problem with the onboard computer that would periodically lock out the ignition circuit. Felt just like a bad starter solenoid--but the part cost $800, plus labor, to replace. Ouch.

Posted on Feb 13, 2009

  • 883 Answers

SOURCE: vw passat 2000 1.8t front wheel drive

please rate me solved...thanks

DTC P0411/16795: SECONDARY AIR SYSTEM - INCORRECT FLOW DETECTED
Test Requirements
Ensure all fuses are okay, battery voltage is at least 11.5 volts, all electrical accessories are off, A/C is off.
Ensure engine is mechanically sound.
Test Procedure

NOTE
Secondary air system is activated by ECM and blows air into exhaust pipe
upstream of catalytic converter for 100 seconds during a cold start, 41-91°F (5-
33°C). Engine must be cold to perform following test procedure.

1. Ensure fuse and secondary fuse (secondary fuse is 40 amp and is located in fuse holder on top of battery)
are okay. Check hoses and components of Secondary Air Injection System, for damage, loose fit and
improper installation, check vacuum hoses for Secondary Air Injection System. Repair as necessary.
Erase DTC memory. Verify repair. If DTC does not reset, test is complete. Perform ECM relearn
procedure. See TEST DRIVE RELEARN PROCEDURE .
2. Remove engine cover. Disconnect pressure hose from Secondary Air Pump Motor (V101), by pressing
buttons on hose connector. See Fig. 33 . Using scan tool, check Secondary Air Pump Motor (V101) in
scan tool Output Diagnostic Test Mode (Secondary Air Pump Relay activation mode). See OUTPUT
DIAGNOSTIC TEST MODE .
3. Secondary Air Pump Motor (V101) should run in intervals and air should exit pump at hose connection.
If Secondary Air Pump Motor (V101) is okay, go to step 7 . If motor runs and no air exits secondary air
pump motor, replace faulty Secondary Air Pump Motor (V101). Erase DTC memory. Verify repair. Test
is complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE . If
secondary air pump motor does not run, go to next step.
4. Disconnect Secondary Air Pump Motor (V101) harness connector, install LED test light at secondary air
pump harness connector terminals. Turn ignition on. Using scan tool, activate Secondary Air Pump Motor
(V101) in scan tool Output Diagnostic Test Mode (Secondary Air Pump Relay activation mode). See
OUTPUT DIAGNOSTIC TEST MODE . LED test light at Secondary Air Pump Motor (V101) harness
connector should flash. If LED test light at Secondary Air Pump Motor (V101) harness connector does
not flash, go to next step. If LED test light at Secondary Air Pump Motor (V101) harness connector
flashes, replace faulty Secondary Air Pump Motor (V101). Erase DTC memory. Verify repair. Test is
complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .
5. Using DVOM check resistance of Secondary Air Pump Motor (V101) wiring. See appropriate WIRING
DIAGRAM under ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS. Resistance should
be a maximum of 1.5 ohms for each reading. Check wiring for short circuit to one another in Secondary
Air Pump Motor (N101) harness connector. Repair as necessary. Erase DTC memory. Verify repair. Test
is complete. Perform ECM relearn procedure.
Secondary Air Pump Motor (N101) wiring is okay, go to next step.
6. Check Secondary Air Pump Relay (J299) and Secondary Air Pump Relay (J299) wiring. See DTC
P0418/16802: SECONDARY AIR PUMP RELAY (J299), MALFUNCTION . Repair or replace as
necessary. Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure. See
TEST DRIVE RELEARN PROCEDURE .
7. Disconnect vacuum hose from Secondary Air Injection Valve (N112) and disconnect pressure hose from
secondary air pump motor, press buttons on pressure hose connector to disconnect pressure hose. See Fig.
34 . Blow lightly into disconnected pressure hose, Combi-Valve should be closed. Connect hand vacuum
pump to disconnected vacuum hose and apply vacuum to Combi-Valve, Combi-Valve should open. If
Combi-Valve opens when vacuum is applied, Combi-Valve is okay. Go to next step. If Combi-Valve
does not open when vacuum is applied, replace faulty Combi-Valve. Erase DTC memory. Verify repair.
Test is complete. Perform ECM relearn procedure. See TEST DRIVE RELEARN PROCEDURE .
8. Check Secondary Air Injection Valve (N112). See DTC P0412/16796: SECONDARY AIR
INJECTION VALVE (N112), ELECTRICAL CIRCUIT MALFUNCTION . Repair as necessary.
Erase DTC memory. Verify repair. Test is complete. Perform ECM relearn procedure.
NOTE: Do not use compressed air to check Combi-Valve.
2000 Volkswagen Passat GLS
2000 ENGINE PERFORMANCE Self-Diagnostics - 1.8L Turbo

Posted on Jun 21, 2008

  • 1 Answer

SOURCE: 2004 VW passat not heating

COLD AIR WHEN IDLING COULD BE...
1) Low on coolant - the most common reason for this heater problem. Make sure your coolant level is full.
If the level is low, it could be because the radiator cap is not sealing well or it could also be a cracked overflow container (hot coolant that bleeds out of the engine and drops to the street so you never see the puddle on your driveway).

2) An air-lock in the coolant system - it needs to be burped. Park your car facing-up the steepest hill you can find. Remove the radiator cap a (be careful - best to do when engine is cold) and rev engine to 2000 RPM for 60 seconds - hopefully the air will burp out the cap. Top it off with 50/50 antifreeze.

3) A disconnected or cracked vacuum line. I've heard about this one but never investigated.

Posted on Feb 28, 2009

  • 2 Answers

SOURCE: 1997 VW Passat trouble code

Hi ejj509,

Both my 97 Passat and my wife's 99 Passat were throwing the same OBD codes you listed.

Both VW's had the same problem. There is no "quick" solution for the problem. I can tell you what I found, what I had to do and how I repaired both vehicles so they no longer throw this OBD error code.

I removed the black plastivc AIR pump and found that three of the six aluminum rivets which hold the AIR pump impeller housing together had rotted off so the case was leaking air. I went to a hardware store with one of the aluminum rivets I had removed from the AIR pump and bought six brass machine screws and brass nuts. I gouged the aluminum rivets out and replaced them with the brass machine screws.

After I had replaced the AIR pump in the VW, I cleared the codes and ran the diagnostics again.
It still threw the same codes!!!

Next, I removed the plastic top engine cover from the VW engine (VR6) and located the many air solenoids hidden under the cover. I went to a local NAPA shop and purchased an eight foot length of their smallest gauge neoprene gas line (1/8 inch ID).

I carefully removed each piece of rotted VW vacuum line from the air solenoids and replaced each rotted section with lengths of the new neoprene gas line. I had to follow out each of the old vacuum lines and replace them because they were badly deteriorated. This took about five hours to accomplish.

I replaced the plastic engine cover and connected up my cable from my laptop to the VW's computer port, cleared all of the codes and ran a new scan. This time the scan was clear! Woo Hoo! Apparently, the problem was both the leaking AIR pump and faulty, deteriorated (cheap) Volkswagen vacuum lines.

It was well worth the effort. My driveway has now become a bonafied VW repair shoppe.



Posted on May 16, 2009

  • 129 Answers

SOURCE: my 2000 vw passat starts but keeps stalling

If it back fired it is possible the timing jump a tooth. If so, you'll have to have the timing sprockets placed back into the proper spots. Have your mechanic do this if it's needed. But in any case have the timing check first.

Posted on May 29, 2009

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2 Answers

I have a 98 vw passat and sometimes take iff slow why is that ??


No power? Your motor sensors are getting conflicting signals, maybe just an oxygen sensor or EGR valve cleaning and some highway miles to settle it in will fix it. Maybe you should find someone with an ODB-II reader (bluetooth, let's say; but it plugs in where those insurance co. readers go) and you pair it with a cellphone to read it (don't check it while drivin', please; the data keeps fine.) Then you'll get all kinds of reasons it's not feeling supercharged from the get-go and can draw a few to fix at a time. Maybe you hit the hypermiling button and it's giving you fixed power to work with...

Mar 21, 2015 | 1998 Volkswagen Passat

1 Answer

I have a 2002 VW Passat, new to me without an owners manual. How does the heater work? I seem to only get cool air but the repair guy gets it to blow hot air. I am thinking it's user error with me?


This regards to the heater problem, make sure the heater unit is not clogged. You may check if there is free flow water to and from the heater by removing the retaining clip from one of the hoses in the battery compartment area. slip away the rubber pipe and make sure the engine is running. In addition to this switch on the heater to maximum. For passat's it is about 30. If there is a free flow of water, there should be no problem otherwise take the vehicle for getting the heater unit inspected.

Nov 01, 2011 | 2002 Volkswagen Passat

1 Answer

I have a 2000 vw passat GLX V6 5 Speed with the error codes p1411 -p1423 how do i fix it


P1411 = Secondary air injection system, bank 2 - insufficient flow detected.
Probable cause: Intake leak, hose(s) blocked / leaking, secondary air system valve / solenoid.

P1423 = Secondary air injection system, bank 1 - insufficient flow detected.
Probable cause: Intake leak, hose(s) blocked / leaking, secondary air system valve / solenoid.


Mar 13, 2011 | 2000 Volkswagen Passat 4Motion

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I have a 2001 VW Jetta 1.8T. The check engine light came up and the codes that came up were P0171 (System too lean, meaning there is too much oxygen in the exhaust). And P0411 (Secondary air injection...


problem is bad AIR FLOW sensor! I am replaced in my 1.8T PASSAT with tuning chip 6.pcs air flow sensors over 3 years !!!!! All VW cars have a air flow problem!!!!! And not only this!!

Nov 15, 2010 | 2002 Volkswagen Passat

1 Answer

I have an overheating 2004 vw Passat I verified the water pump was working by removing the fill line to the fill tank and it was flowing steady at 2000 rpm. I also burped the system by running the car at...


it could be the thermostat. if the car stays at normal operating temp at idle and only gets hot when you drive it is the water pump. i just changed one that never overheated at idle even when it set for an hour or more. as soon as I tried to drive it I would get a mile down the road and it would be burning hot. took the water pump off and the impeller was spinning on the pump shaft.

Jun 17, 2010 | 2001 Volkswagen Passat

1 Answer

2001 vw passat estate is not picking up speed. when going along motor way if i change lanes it goes slow and takes time to pick up again


get your air flow meter tested, this is common.
is your car petrol or diesel.
more of a problem on diesel.

Aug 17, 2009 | 2001 Volkswagen Passat

2 Answers

1999 VW Passat low idle


replace your fuel filter first. If that does not do it, then try an air-flow meter. (if the check engine light is on it may be an airflow meter.

Jul 10, 2009 | 1999 Volkswagen Passat

1 Answer

Does anyone know what power steering fluid I need for a VW Passat


Mineral power steering fluid only from dealer $30, 1 gal
other oils have been causing the pump not to operate
properly on 99+ passat, jetta, golf, 99+ a4, a6, a8 .

Apr 26, 2009 | 1999 Volkswagen Passat

1 Answer

Over heating


Check your thermostat. To see if it opens when hot. From cold drop the thermostat in hot water, if it opens it is alright.

Oct 22, 2008 | 2003 Volkswagen Passat

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