why did my check engine light come on after I had my spark plugs changed and added gas treatment

5

Asked by Jul 08, 2015 at 10:31 AM about the 1999 Mercedes-Benz M-Class ML 320

Question type: Maintenance & Repair

1999 ML320 170K - car will only start after 2nd try when turning the key, now check
engine light is on after tune-up- the car is not running hot but slow.

5 Answers

21,775

WHY put gas treatment in??!!!!

5

because the car was not turning over the 1st time I tried starting the car so my mechanic said put gas treatment- I only use 93 supreme

5

The mechanic had just finished putting my spark plugs in that day

232,755

Check your gas cap, see if it's tight. If the light doesn't go off after 3-4 cycles, then have the car scanner for the codes.

Best Answer
345

Go to AutoZone and have them scan for the code for free and see what the cause is... Then you willl have a good starting point... It could be a number of things going on with your car...

Your Answer

Add photo

Related Questions

M-Class

Looking for a Used M-Class in your area?

CarGurus has 5,152 nationwide M-Class listings starting at $2,980.

ZIP:

Search Mercedes-Benz M-Class Questions

Mercedes-Benz M-Class Experts

#1 jihadghazali
jihadghazali
Reputation 1,140
#2 wellness
wellness
Reputation 880
#3 snowseal19
snowseal19
Reputation 580
View All

Related Models For Sale

Used BMW X5
449 Great Deals out of 16,667 listings starting at $2,000
Used Mercedes-Benz E-Class
386 Great Deals out of 21,882 listings starting at $699
Used Mercedes-Benz C-Class
483 Great Deals out of 28,941 listings starting at $1,499
Used Mercedes-Benz S-Class
141 Great Deals out of 6,586 listings starting at $1,200
Used Mercedes-Benz G-Class
11 Great Deals out of 1,159 listings starting at $22,990
Used Jeep Grand Cherokee
1,045 Great Deals out of 73,793 listings starting at $950

Used Cars For Sale

2015 Mercedes-Benz M-Class For Sale
30 Great Deals out of 674 listings starting at $23,995
2014 Mercedes-Benz M-Class For Sale
29 Great Deals out of 1,120 listings starting at $23,995
2013 Mercedes-Benz M-Class For Sale
27 Great Deals out of 371 listings starting at $19,995
2012 Mercedes-Benz M-Class For Sale
16 Great Deals out of 376 listings starting at $17,699
2011 Mercedes-Benz M-Class For Sale
19 Great Deals out of 435 listings starting at $11,795