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#1
06-06-2003, 07:42 PM
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DTC codes for 400E or E420
Does anyone know the codes for the 124 chassis 400E of E420. My car has the led indicator and I have couple of codes coming up as well as the 'Check Engine" light on. I went on JimF website and found that he has a table of what the codes mean, just that his car is a 140. Are the codes the same for mine? If not does anyone know where to look.
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1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500 
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#2
06-06-2003, 11:56 PM
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400E of E420 ??
Different cars and codes I guess you mean 400E , 124.034 http://www.autolib.diakom.ru:8000/CARS2/pribor/cs1000/manual/cs1000_mb.pdf page 35 Last edited by Arthur Dalton; 06-07-2003 at 06:13 PM.
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#3
06-07-2003, 12:13 PM
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Here's the DTCs for '92 400E
FAULT CODES
---------------------- DTC# Possible Cause of Failure 1 No fault found 2 Oxygen sensor faulty 3 Lambda control faulty 4 Air injection system faulty 5 Exhaust gas recirculation faulty 6 Idle speed control faulty 7 Ignition system faulty 8 Engine coolant temperature sensor. Circuit open or circuit short 9 Intake air temperature sensor. Circuit open or circuit short 10 Voltage at mass air sensor too high/low 11 TNA-signal (rpm signal ) faulty 12 Oxygen sensor greater, circuit open or circuit short 13 Camshaft position sensor signal from ignition control module faulty 14 Intake manifold pressure too low when starting 15 Wide open throttle position information faulty 16 Closed throttle position information faulty 17 Data exchange fault between individual control module 18 Adjustable camshaft timing solenoid circuit open or circuit short 19 Injector open or short circuit or emission control system adaptation at limit 20 Vehicle speed signal missing 21 Purge switchover valve, circuit open or circuit short 22 Camshaft position sensor signal faulty 23 Intake manifold pressure with engine running too low 24 Starter ring gear segments faulty 25 Knock sensors faulty 26 Upshift delay switchover valve, circuit open or circuit short 27 Engine coolant temperature sensor deviation between sensor circuit 1 and sensor circuit 2. 28 Engine coolant temperature sensor (engine coolant temperature change monitor)
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#4
06-07-2003, 05:56 PM
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Thanks for the table, and the link to the pdf. I tested the system today and cmae up with codes 4, 5, and 17. Does anyone have any idea what these mean? I think that code 4 refers to a bad mass air sensor, 5 could be the O2 sensor, and 17 I have no clue about.
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1992 Mercedes-Benz 400E 2002 Mercedes-Benz ML500
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#5
06-07-2003, 06:32 PM
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Code 4 is AIR system and 5 is EGR system..
Because BOTH these systems Switch -Over- Valves are supplied engine vac from a Common intake vac line , I would check that line for cracks/broken/disconnect... If this singe vac line is broken, Both systems will not operate and they will Both throw a CE lamp/code... There can be many other causes, but start there first due to both codes coming up at the same time... and it is common to see this line broken from heat fatique... Last edited by Arthur Dalton; 06-07-2003 at 06:41 PM.
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