Question about 2002 Volkswagen Golf

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My 1.8t golf is misfiring with maf connected and disconnected.my mate stuck it on his diagnostics and it had 2 codes:one for the coolant temperature sensor and one for maf.replaced coolant sensor,what is the problem? please help.

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Replace the maf.also if the car has coil packs,check those too.

Posted on Oct 09, 2009

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Car sputtering badly. Codes P303 n P102 show on diagnostics and have replaced both parts associated with these codes,PLUS, new fuel filter, engine still sputtering badly.


Hi,

I hope I can help with this. This could mean the engine spark plugs or plug is the issue. Also check the exhaust pipe. White smoke indicates a coolant issue. Check your coolant reservoir. Black smoke indicates a Fuel issue. Blue is an oil issue. Also, speaking of your spark plugs there very well could be a misfire.

the code P303 could be cylinder 3 misfire
P102 the mass air flow sensor which is on the air filter cover. It's an electrical part and is sensor. Please check these and let me know.

Jul 28, 2016 | Cars & Trucks

3 Answers

Engine code p110


P0303 Code - Cylinder #3 Misfire
P0110 DTC - IAT Circuit Malfunction
P2195 O2 Sensor Signal Biased/Stuck Lean (Bank 1 Sensor 1) Code
Potential causes of a P2195 code include:
p2195
p219521
  • Oxygen (O2) or A/F ratio sensor or sensor heater malfunction
  • Open or short in O2 sensor circuit (wiring, harness)
  • Fuel pressure or fuel injector problem
  • Faulty PCM
  • Intake air or engine vacuum leaks
  • Faulty fuel injector(s)
  • Fuel pressure too high or too low
  • PCV system leak/fault
  • A/F sensor relay faulty
  • MAF sensor malfunction
  • ECT sensor malfunction
  • Fuel pressure too low
  • Fuel leak
  • Air suction in air intake system
  • A code P0303 may mean that one or more of the following has happened:
  • Faulty spark plug or wire
  • Faulty coil (pack)
  • Faulty oxygen sensor(s)
  • Faulty fuel injector
  • Burned exhaust valve
  • Faulty catalytic converter(s)
  • Running out of fuel
  • Poor compression
  • Defective computer
  • Potential causes of the P0110 DTC include:

  • po110
    • IAT sensor shifted out of airflow
    • Bad IAT sensor
    • Shorted to ground or open on signal circuit to IAT
    • Open in ground circuit to IAT
    • Poor connection at IAT (backed out terminals, broken connector locks, etc.)
    • Bad PCM

Sep 25, 2014 | 2003 Ford Focus

1 Answer

99 mpv missfires,splutters.wont idle & has no power. when MAF is disconnected runs a lot better. I replaced the Maf but still does the same.The problem started suddenly,drove to work ok but when i


replace fuel filter, clean fuel injectors.could have bad fuel, do a code scan before buying new parts.faulty egr valve or faulty engine coolant temperature sensor cause engine run poorly.replace spark plugs and wires because if spark plug wires is bad or spark plug and ignition coil is bad that will cause rough idling misfiring and stalling you have dead cylinder not firing properly..

Oct 01, 2012 | Cars & Trucks

1 Answer

Misfire at 55mph on 96 4runner v6 3.4l


Hello
The Engine and Automatic Transmission (not applicable to manual transmissions) in this vehicles drive train are fully electronically controlled by a computer called the PCM and TCM (Power Train Control Module, Transmission Control Module). When a problem like this or other drive-ability related problems occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM. Also always check fuel pressure for correct spec for your make and engine type.

Sep 13, 2012 | Cars & Trucks

3 Answers

P1200how we solve indigo diacore


Hi there:
DTC P1200 - lnjector control circuit


The PCM has the ability to detect a misfire by monitoring the 3X reference and camshaft position input signals from the Ignition Control Module. The PCM monitors crankshaft speed variations (reference period differences) to determine if a misfire is occurring. If 2 percent or more of all cylinder firing events are misfires, emission levels may exceed mandated standards. The PCM determines misfire level based on the number of misfire events monitored during a 200 engine revolution test sample. The PCM continuously tracks 16 consecutive 200 revolution test samples. If 11 or more misfires are detected during any 5 of the 16 samples, DTC P0300 will set. If the misfire is large enough to cause possible three-way catalytic converter damage, DTC P0300 may set during the first 200 revolution sample in which the misfire was detected. In the case of a catalyst damaging misfire, the Malfunction Indicator Lamp (MIL) will flash to alert the vehicle operator of the potential of catalyst damage.


CONDITIONS FOR SETTING THE DTC

* No Vehicle Speed Sensor (VSS), Transaxle, Throttle Position (TP) sensor, Fuel trim, Fuel injector circuit, Engine Coolant Temperature (ECT) sensor, Crankshaft Position (CKP) sensor, Camshaft Position (CMP) sensor, or Mass Air Flow (MAF) sensor DTC(s) set.

* Engine speed between 450 and 5800 RPM.

* System voltage between 9 and 16 volts.

* The ECT indicates an engine temperature between -7 degrees C (19 degrees F) and 120 degrees C (248 degrees F).

* Throttle angle steady.

* The PCM is detecting a crankshaft RPM variation indicating a misfire sufficient to cause three-way catalytic converter damage or emissions levels to exceed mandated standard.


ACTION TAKEN WHEN THE DTC SETS

* If the misfire level is non-catalyst damaging, the PCM will illuminate the MIL during the second key cycle in which the DTC sets.

* If the misfire is severe enough to cause possible catalyst damage, the PCM will immediately flash the MIL while the misfire remains at catalyst damaging levels.

* The PCM will disable Torque Converter Clutch (TCC) operation.

* The PCM will store conditions which were present when the DTC set as Freeze Frame and Fail Records data.


CONDITIONS FOR CLEARING THE MIL/DTC

* The PCM will turn the MIL OFF during the third consecutive trip in which the diagnostic has been run and passed.

* The history DTC will clear after 40 consecutive warm-up cycles have occurred without a fault.

* The DTC can be cleared by using the scan tool Clear Info function or by disconnecting the PCM battery feed.

DIAGNOSTIC AIDS

The scan tool provides information that can be useful in identifying the misfiring cylinder. If the DTC P0300 is currently stored as DTC status Failed Since Code Clear, the misfire history counters (Misfire Hist #1 - #6) will still contain a value that represents the level of misfire detected on each cylinder. The scan tool displayed misfire counter values (Misfire Hist. #1 through #6) can be useful in determining whether the misfire affects a single cylinder, a cylinder pair (cylinders that share an ignition coil-1/4, 2/5, 3/6), or is random. If the largest amount of activity is isolated to a cylinder pair, check for the following conditions:

* Secondary Ignition Wires.

Check the secondary wires associated with the affected cylinder pair for disconnected ignition wires or for excessive resistance. The wires should measure under 30,000 ohms (30 K ohms). Replace any wires with excessive resistance.

* Damaged Or Faulty Ignition Coil.

Check for cracks, carbon tracking or other damage. Also check coil secondary resistance. Secondary resistance should be between 5000 ohms and 8000 ohms (5 K ohms and 8 K ohms). Replace any faulty coil(s). Refer to Ignition Control Module.

* Substitute a Known Good Coil.

Switch ignition coils and retest. If the misfire follows the coil, replace the ignition coil.

If the misfire is random, check for the following conditions

* System Grounds.

Ensure all connections are clean and properly tightened. Refer to Ground Distribution in Electrical Diagrams.

* Mass Air Flow sensor.

A Mass Air Flow (MAF) sensor output that causes the PCM to sense a lower than normal air flow will cause a lean condition. Try operating the vehicle within the fail records conditions with the MAF sensor disconnected. If the lean or misfiring condition is not present with the MAF sensor disconnected, replace the MAF sensor. Refer to MAF Sensor.

* Damaged accessory drive belt or driven accessory.

A damaged serpentine belt or belt driven accessory can cause engine load variations sufficient to set a misfire DTC.

* Vacuum Leaks.

Vacuum leaks that cause intake air to bypass the MAF sensor will cause a lean condition. Check for the following conditions:

- Disconnected or damaged vacuum hoses. Refer to Emission Hose Routing Diagram.

- Incorrectly installed or faulty crankcase ventilation valve. Refer to Positive Crankcase Ventilation Valve

- Vacuum leaks at the throttle body, EGR valve, and intake manifold mounting surfaces.

* Fuel Pressure.

Perform a fuel system pressure test. A faulty fuel pump, plugged filter, or faulty fuel system pressure regulator will contribute to a lean condition. Refer to Fuel System Pressure Test. See: Computers and Control Systems > Component Tests and General Diagnostics > Fuel System Pressure Test

* Fuel injector(s). Go to Fuel Injector Coil Test. See: Computers and Control Systems > Component Tests and General Diagnostics > Fuel Injector Coil Test

* Contaminated Fuel. Go to Alcohol/Contaminants-in-Fuel Testing Procedure. See: Fuel Delivery and Air Induction > Testing and Inspection

* EGR System.

Check for leaking valve, adapter, or feed pipes which will contribute to a lean condition or excessive EGR flow.

* Extended Idle.

Excessive open loop operation caused by extended idling or short trip driving may leave deposits on the heated oxygen sensors. The deposits cause oxygen sensors to respond slowly to exhaust oxygen content, affecting fuel control and causing a misfire to be indicated at idle. This condition is not permanent. To determine if this condition is causing the DTC P0300 to be set, review the freeze frame and fail records data for DTC P0300. If the DTC P0300 occurs at high engine speeds, the condition described above did not cause the DTC P0300 to set. If the DTC P0300 occurs at idle or very low engine speeds and at engine coolant temperatures below 80 degrees C (176 degrees F), the condition described above is very likely the cause of the DTC P0300 being set. The deposits on the heated oxygen sensors can be eliminated by operating the vehicle fully warm at mass air flows above 15 gm/s.

Important: If the level of misfire was sufficient to cause possible catalyst damage (if the MIL was flashing), ensure that the DTC P0420 test is completed and passed after verifying the misfire repair.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.



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Aug 13, 2012 | Tata Indigo Cars & Trucks

1 Answer

1994 chevy truck will start then dies


Hello
The engine and automatic transmission in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Aug 10, 2012 | Cars & Trucks

1 Answer

Toyota has a misfire at 100kph


Hello
The engine and transmission in this cars drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPEDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Jul 16, 2012 | Cars & Trucks

1 Answer

Codes. 0307. O128. 0316. 1000. 2106.


P0307 = cylinder no.7 misfire detected.
P0316 = misfire detected during startup-first 1000 revolutions.
P0128 = coolant thermostat (coolant temperature below thermostat regulating temperature)
P1000 = On board diagnostic readiness test not complete.
P2106 = Throttle actuator control (TAC) system----forced limited power mode.

Check the spark plug, spark plug wire, coil, and fuel injector for cylinder 7. Check compression on cylinder 7. When the no. 7 misfire is solved, clear the codes.

Feb 26, 2011 | Ford E-150 Cars & Trucks

1 Answer

I have a trouble code P1296 & P0302 on my 2002 Volkswagen Golf. Can you tell me what these codes mean and how to fix


17704/P1296/004758
if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 17704/P1296/004758 - Error in Mapped Cooling System Possible Symptoms
  • Cold start issues
Possible Causes
  • Coolant Temperature Sensor (G62) faulty
  • Coolant Thermostat faulty
Possible Solutions
  • Check Coolant Temperature Sensor (G62)
  • Check Coolant Thermostat

16686/P0302/000770 Contents if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } 16686/P0302/000770 - Cylinder 2 Misfire Detected Possible Causes
  • Ignition system
  • Fuel injectors
  • Fuel pressure
  • Running out of fuel
  • EVAP canister purge valve
  • Evaporative emission system
  • Low compression
  • Base engine problems
  • Controle Module damaged
Special Notes
  • This feature search for engine misfire in a specific cylinder. Most of the time the cause for a misfire is a lack of combustion in a cylinder due to absence of spark, poor fuel metering, or poor compression.

Jan 03, 2010 | 2002 Volkswagen Golf

1 Answer

OBDII LIGHT IS ON


P0302 is a mechanical fault code meaning there could be a problem with the wiring or ignition/fuel system, could be a bad injector or ECT/MAF sensor or the ECM. (ECT=engine coolant temperature sensor)(MAF=Air flow sensor)(ECM=Engine control Module)

Apr 25, 2009 | 1996 Chevrolet Suburban

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