Misfiring of cylinder 1 : Damages TWC (P0301)

If you are experiencing a misfiring of cylinder 1 that is causing damage to the TWC (Three Way Catalyst), here are some steps you can take to diagnose and potentially fix the issue:

1. Check the spark plugs: Worn or fouled spark plugs can cause misfires. Check the spark plug in cylinder 1 for wear or damage, and replace if necessary. Consider replacing all spark plugs at the same time, as they tend to wear out at around the same rate.

2. Check the ignition coil: The ignition coil is responsible for creating the spark that ignites the fuel in the cylinder. A faulty ignition coil can cause misfires. Check the ignition coil for proper operation and replace if necessary.

3. Check the fuel injector: A clogged or faulty fuel injector can cause misfires. Check the fuel injector for proper operation and replace if necessary. Consider having all fuel injectors cleaned or replaced at the same time to prevent future issues.

4. Check the compression: Low compression in cylinder 1 can cause misfires. A compression test can determine if this is the case. If low compression is found, you may need to repair or replace the cylinder head or piston rings.

5. Check for vacuum leaks: A vacuum leak can cause a lean air/fuel mixture, which can cause misfires. Check all vacuum lines for leaks and repair or replace as necessary.

6. Check the catalytic converter: A clogged or damaged catalytic converter can cause misfires and damage to the TWC. Check the converter for proper operation and replace if necessary.

If you are not able to diagnose or fix the issue on your own, it is recommended to take your vehicle to a certified mechanic or dealership for further diagnosis and repair. A professional may be able to perform a more thorough inspection of the engine and identify any other issues that could be causing the problem.

Misfiring of cylinder 1 : Damages TWC (P0301)

Misfiring of cylinder 1 : Damages TWC (P0301)
Misfiring of cylinder 1 : Damages TWC (P0301)
Possible cause:
­ Combustion misfirings
Affected functions:
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Engine diagnosis
Engine running
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Test 1: Check component T1/1 (ignition coil cylinder 1).
Copyright ? 2013, ALLDATA
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Page 5542010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
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Test 2: Check component Y62y1 (Fuel injector cylinder 1).
Test 3: Combustion misfirings
1. Check component T1/1 (ignition coil cylinder 1).
Warning!Hazard as a result of high voltage at the ignition system!
­
Electronic ignition systems operate within a hazardous power range both at the low voltage side (primary circuit) as well as on the
high voltage side (secondary circuit).
­ Contacts with such parts can result in burns, heart flutter or cardiac arrest.
Rules of conduct and protective measures
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Persons with heart pacemakers must not perform any work on the ignition system.
Switch off the ignition when performing work on the ignition system.
Do not touch any parts of the ignition system when starting the engine or when the engine is running.
Wear protective shoes with rubber soles.
Do not install any uninsulated adapters into the ignition cables.
1. No further information available.
2. Check component Y62y1 (Fuel injector cylinder 1).
Safety note
Warning!Risk of explosion, poisoning and injury!Fuels are highly inflammable and toxic if inhaled. Fuels may cause skin damage. fuel
vapors are explosive, invisible and spread out at floor level, they are toxic if inhaled and produce giddiness and an anaesthetizing
effect.Rules of conduct and protective measures
­ Wear suitable protective clothing.
­ Pay attention to national safety precautions and regulations.
­ No fire, sparks, naked flames and smoking.
­ Ensure the work place is adequately ventilated.
­ Never drain or pour in fuels over assembly pits.
­ Store drained fuel in a suitable and sealed vessel.
­ Immediately eliminate any fuel which has flowed out.
First­aid measures
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Clean moistened skin with water and soap.
Change moistened clothing as quickly as possible.
If fuel gets into your eyes, rinse out your eyes immediately with water and contact a doctor if necessary.
Test 2.1: Test actuation of component Y62y1 (Fuel injector cylinder 1).
Test 2.2: Test signal voltage of component Y62y1 (Fuel injector cylinder 1).
Test 2.3: Check internal resistance of component Y62y1 (Fuel injector cylinder 1).
Test 2.4: Inspect component Y62y1 (Fuel injector cylinder 1) for leaks.
Test 2.5: Inspect operation and spray pattern of component Y62y1 (Fuel injector cylinder 1).
2.1. Test actuation of component Y62y1 (Fuel injector cylinder 1).
Test prerequisite
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Coolant temperature > 80? C
Engine RUNNING
Warning!Communication with ECU required.
2.2. Test signal voltage of component Y62y1 (Fuel injector cylinder 1).
Figure legend2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
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Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Test sequence
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Note
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Switch off ignition.
ConnectionMeasuring system
Observe oscilloscope pattern between sockets [M.23] 23 and [F.3] 99 of the 126­pole socket box tester.
Run engine.
Measuring system:Communication with ECU required
2.3. Check internal resistance of component Y62y1 (Fuel injector cylinder 1).
Figure legend
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
Page 5562010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
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Copyright ? 2013, ALLDATA
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Page 557
Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Test sequence
­ Switch off ignition.
­ Connect socket box (126­pin) to component N3/10 (ME­SFI [ME] control unit).
­ Measure resistance with multimeter between sockets [M.23] 23 and [F.3] 99 of the 126­pole socket box tester.
Specified value
­ Resistor[11...17]ohms
Question
­
Is the measurement value OK?
YES
The measurement value is OK.Note
­
In the event of stored faults with a high fault frequency count or in the event of customer complaints, check lines and connectors
for loose contact and corrosion..
NO
The measurement value is not OK.Test sequence
­ Switch off ignition.
­ Connect shop­made test cable set to component Y62y1 (Fuel injector cylinder 1).
­ Measure resistance with multimeter between pins (Y62) 1 and (Y62) 2
Specified value
­ Resistor[11...13]ohms
Question
­
Is the measurement value OK?2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
YES
The measurement value is OK.Possible cause and remedy
­
Lines to component Y62y1 (Fuel injector cylinder 1)
NO
The measurement value is not OK.Possible cause and remedy
­
Y62y1 (Fuel injector cylinder 1)
2.4. Inspect component Y62y1 (Fuel injector cylinder 1) for leaks.
Figure legend
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
­
­
Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Figure legend
­ 055Measuring beakerY62 (Fuel injectors)
Test sequence
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Switch off ignition.
Remove fuel rail together with component Y62 (Fuel injectors).
Connect socket box (126­pin) to component N3/10 (ME­SFI [ME] control unit).
Bridge between sockets (F.4) 100 and (F.17) 113 of the 126­pole socket box tester.
Page 5582010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
­ Switch on ignition.
Specified value
­ Component Y62y1 (Fuel injector cylinder 1) must not drip.
Question
­
Was the test o.k.?
YES
The test was okay.Further possible causes of fault
­
Inspect operation and spray pattern of component Y62y1 (Fuel injector cylinder 1).
NO
The test was not okay.Possible cause and remedy
­
Y62y1 (Fuel injector cylinder 1)
2.5. Inspect operation and spray pattern of component Y62y1 (Fuel injector cylinder 1).
Figure legend
­ A ­ConnectionTest cable 35­pin socket box
­ 001 ­Sockets of component N3/10 (ME­SFI [ME] control unit)
­ 05 ­35­pin socket box
­ 050 ­126­pin socket box
­ 108 ­Test cable 266 589 01 63 00
­ N3/10 (ME­SFI [ME] control unit)
­ II 1­63ConnectionTest cable
­ III 64­126ConnectionTest cable
Warning!
­
­
Connection A of test cable 108 may NOT be connected to connection B of the 126­pin socket box (050).
Page 5592010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
10.52SS
Page 560
Figure legend(Shop­made tool)
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1xClutch 140 545 35 28
2xContact spring 004 545 56 26
1xRed banana connector
1xBlack banana connector
2,2 mRed cable with diameter 1,5 mm(Pin 1)
2,2 mBrown cable with diameter 1,5 mm(Pin 2)
2 mInsulation sheathing with diameter 6 mm
Test sequence
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Switch off ignition.
Remove fuel rail together with component Y62 (Fuel injectors).
Connect socket box (126­pin) to component N3/10 (ME­SFI [ME] control unit).
Insert bridge.
Bridge between sockets (F.2) 98 and (F.17) 113 of the 126­pole socket box tester.
Switch on ignition.
Component M3 (Fuel pump) runs.
Hold component Y62y1 (Fuel injector cylinder 1) in a vessel and briefly operate manually with shop­made test cable set at sockets2010 Mercedes Benz E 63 AMG Sedan (212.077) V8­6.3L (156.985)
Copyright ? 2013, ALLDATA
98 and 99 of the 126­pin socket box.
Specified value
­ Fuel injectors should eject fuel uniformly.
Question
­
Was the test o.k.?
YES
The test was okay. End of test
NO
The test was not okay.Possible cause and remedy
­ Y62y1 (Fuel injector cylinder 1)
End of test
3. Combustion misfirings
Warning!Communication with ECU required.