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99 E300 Turbo Obd Ii Codes
I may have done some damage this time??? I was curious to see how the egr solenoid was working with respect to throttle position. I was testing the plug with two wires that go to it with my test light. Whe I was on the positive lead with my test light in the plug I reached over to move the throttle and the test light just nipped ground. There was barely a spark but the light went out and never returned. I should have been using my volt meter!!!
The check engine light illuminated and I read three codes: P0100 - Mass air flow circuit malfunction P0243 - Wastegate solenoid P0400 - Egr flow I believe the wastegate and egr solenoids are on the same circuit and I guess the mass air flow too. I am wondering if I fried this circuit in the computer? I do not think there are any fuses for this sort circuit is there? I was under the impression it all ran through the computer. I did clear the codes and they just immediately come back. The car runs ok with the exception of lack of power which I know happens when either the egr or wastegate codes come up. Does anyone have any info on this? I am thinking at the worst an engine computer and maybe the MAF and solenoids. Thanks! __________________
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-disav 99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete 98 E300 TURBODIESEL Alexandrite Green on black leather 289K 95 E300 DIESEL Green Queen 267K SOLD 84 300D 216k SOLD 87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD 76 300D 214K SOLD |
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At worst the engine computer? Have you priced it?
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Start by checking the K40 power supply relay in the COMPUTER box. There are between 4 & 6 fuses in the power supply relay.
It is located at the right rear of the engine compartment..you have to un-screw the cover..good luck.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator |
#4
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Thanks M.B.DOC!! There was a 10A out where you said. I am relieved.
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-disav 99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete 98 E300 TURBODIESEL Alexandrite Green on black leather 289K 95 E300 DIESEL Green Queen 267K SOLD 84 300D 216k SOLD 87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD 76 300D 214K SOLD |
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