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Audi A8 3.0 petrol auto

Misfire identified fault No 17981 left engine solenoid valve. this was replaced and the car was ok for a day and now it misfires again and smokes when started up. Each time we put it on the machine same fault appears when we clear the codes it is ok fo the rest of the day, then misfires again the next day for a moment when started up.

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SOURCE: Audi v6 2.8l (AAH) warm misfire at idle

It is necessary to replace rings on pistons.

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SOURCE: Intermittant misfire Audi A3 1.8T (1999)

Sounds like carbon build-up in the cylinders. Take it and have it put on a machine called a "Motor-Vac"

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SOURCE: Need help with Audi A4 2000 1.8t Misfiring and Fuel/Air Problems?

replace the speed idle sensor

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i'm very convinced it is your mas airflow sensor!!! Had the same problem on my A4

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SOURCE: misfire cylenders 5 and 8 audi A8 quatro 4.2

Check the injectors for those 2 cylinders.

Posted on May 13, 2009

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Starts up but runs rough, exhaust smells, and when you give it gas it wants to shut off.

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How to find codes for check engine light on

Check Engine Light Codes and Meanings
Long blinks Short blinks Problem
1 1 Camshaft position sensor
1 2 Mass air flow sensor
1 3 Engine coolant temperature sensor
1 4 Speed sensor
1 11 EVAP control system (flow)
1 14 Fuel injection system right bank (too rich)
1 15 Fuel injection system right bank (too lean)
2 1 Ignition circuit
2 3 Closed throttle position switch
2 5 Idle speed control
2 9 Fuel Injection system left bank (too rich)
2 10 Fuel Injection system left bank (too lean)
3 1 ECU
3 2 Exhaust gas recirculation system flow problem
3 3 Front left O2 sensor
3 4 Knock sensor
3 5 Exhaust gas recirculation temperature sensor
3 6 EGRC-BPT valve
3 7 Closed loop control
3 8 Closed loop control
4 1 Air intake temperature sensor
4 2 Fuel tank temperature sensor
4 3 Throttle position sensor
4 7 Crankshaft position sensor
5 3 Front right O2 sensor
5 4 Automatic transmission control unit
6 3 Cylinder #6 misfire
6 4 Cylinder #5 misfire
6 5 Cylinder #4 misfire
6 6 Cylinder #3 misfire
6 7 Cylinder #2 misfire
6 8 Cylinder #1 misfire
7 1 Multiple cylinder misfire
7 2 Three way catalytic converter (right side)
7 3 Three way catalytic converter (left side)
7 4 Evaporative emission control system pressure sensor
7 5 Evaporative emission control system
7 7 Rear O2 sensor
8 1 Vacuum cut valve bypass valve
8 2 Crank position sensor
8 3 Absolute pressure sensor
8 4 Automatic transmission control unit
8 6 Evaporative emission canister purge control solenoid valve
8 7 Evaporative emission Canister purge control solenoid valve circuit
9 1 Front Right O2 sensor
9 3 Evaporative emission Canister vent control valve
9 5 Crankshaft position sensor
9 8 Engine coolant temperature sensor
10 1 Front left O2 sensor
10 3 Park and Neutral position switch
10 5 EGRC solenoid valve
10 8 Evaporative emission canister purge volume control valve
11 1 Inhibitor switch
11 2 Revolution sensor
11 3 Improper shifting to first gear (Automatic transmission)
11 4 Improper shifting to second gear (Automatic transmission)
11 5 Improper shifting to third gear (Automatic transmission)
11 6 Improper shifting to fourth gear (Automatic transmission)
11 7 Solenoid valve lock up function
12 1 Shift solenoid B (Automatic transmission)
12 3 Overrun clutch solenoid valve (Automatic transmission)
12 4 Torque converter clutch solenoid valve (Automatic transmission)
12 5 Line pressure solenoid valve (Automatic transmission)
12 6 Throttle position sensor (Automatic transmission)
12 7 Engine speed signal
12 8 Fluid temperature sensor
13 2 MAP/BARO Switch Solenoid Valve
13 5 Fuel pump control module
13 8 Cooling fan

Dec 12, 2011 | 1995 Nissan Maxima

1 Answer

I have a 2003 a4/b6 1.8 turbo and the engine light is on. The DTC codes says random misfire, misfire on cylinder #2 and #3 also, Oxygen (Lambda) Sensor Regulation: Bank 1: System too Lean : P1111. Any...

If you can supply me with all the codes your vehicle is showing, I can assist you. As far as the P1111 DTC goes I have listed the info below with some possible solutions.

P1111- Intake Valve Timing Control Solenoid Valve Circuit Bank 1

Intake valve timing control solenoid valve is activated by ON/OFF pulse duty (ratio) signals from the ECM. The intake valve timing control solenoid valve changes the oil amount and direction of flow through intake valve timing control unit or stops oil flow. The longer pulse width advances valve angle. The shorter pulse width retards valve angle. When ON and OFF pulse widths become equal, the solenoid valve stops oil pressure flow to fix the intake valve angle at the control position. The code is triggered when an improper voltage is sent to the ECM through intake valve timing control solenoid valve. Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change engine oil and filter and reset engine code.

Possible Causes:
- Intake valve timing control solenoid valve bank 1 circuit is open or shorted.
- Intake valve timing control solenoid valve bank 1 circuit connectors
- Intake valve timing control solenoid valve bank 1
- Dirty Oil

Possible Solutions:
- Change Oil
- Replace Intake valve timing control solenoid valve

Jan 20, 2011 | 2003 Audi A4 Cabriolet

1 Answer

I have a 1988 Audi 5000 CS TQ with 173000 miles. Last month the car started to have 2 misses at cold start (cant remember for hot starts) that you could actually HEAR go away after the first 30 seconds of...

Did you notice if there was oil on the spark plug wires after you pulled the wires? If so you may need to replace the valve cover gaskets. They keep oil from going on the spark plug wires which in turn can cause the mis fire.

Dec 05, 2010 | 1988 Audi 5000 CS

2 Answers

I drive a Mercedes Benz C200, 1998 Model and I have a problem getting it started (particularly in the morning) after I have not been driving for a while. Once I start to drive again it sometimes fails to...

Your fault need identification after the vehicle is parked for a long time. The nearest possible area of doubt is the condition of the engine. You have not specified the mileage clocked and the regularity of periodic service because if this is done systematically there can be lesser areas to look for in our trouble shooting solution. Hencce to start with your fuel pump, the fuel filter and see if the fuel drains off inthe fuel system when parked for long time. If so identify whether it is in the fuel system or the pump. If fuel seems fine, the engine compression, valve setttings must be in order for a quick start. If this shows good reading, asssesment of the compression of each cylinder by a test of the pressure of air exhausting in each of the cylinders is good. If this looks ok then check on the to the actuator or the auto choke valve. If possible drain off/ run off your fuel and try a different higher grade. I have the feeling that the fault could be the firing or the fuel both of which you can check on alternate days before starting( for petrol check your plugs, your HT coils or replace, for diesel check your glow plugs and replace if bad or worn out ). Hope I could assist. Good day

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1 Answer

My check engine light came on my dash. Audi 2004 2.7 TT

the problem can be caused by vacuum leaks .. in some engines the vacuum hoses pass above the engine where they can get very hot .. they crack, split or just leak .. this causes several bad things to happen including the secondary air injection problem (vacuum operated valves) ... on at least some cars like the passatt there is a vacuum hose kit available that replaces all the critical hoses .. maybe audi has the same type repair kit ..

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I have a vw passat 2001 2.0s petrol which has developed a fault. the engine management light came on some 3 weeks ago and since then the dealer has fitted a new cat and replaced some oil breather pipes but...

vaccum leaks cause this type of misfire . this sometimes happens when someone works on car and does not tighten hoses also could be low fuel pressure or lean fuel caused by air to fuel ratio. i would try vaccum first

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1 Answer

2004 Audi A4 misfire

it is always a good idea to stay with o.e.m parts and yes there is updated parts in the newer coils. and yes the M.A.F will also cause misfire faults but will not make check engine light flash or make car shake and shudder. also check you wire harness going to your coils make sure your ground wires are not cracked. That could be the main culprate. good luck hope this helps

Jul 28, 2009 | 2004 Audi A4

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