No start

Tiny
ALLTO
  • MEMBER
  • 2004 MERCEDES BENZ C230
  • 1.8L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
My 2004 Mercedes c230 will crank over but will not start and has 3 codes in it which are P0128, P0171, P0600. Can you please help me out with this problem. Thanks
Saturday, January 9th, 2016 AT 11:32 AM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
The only one of those codes that could be connected with a no start is the P0600. That is a module communication error. You really need a professional level scan tool to be able to diagnose any of this.

You could do some basic no start testing in the meantime.

All "crank, no start" conditions are approached in the same way. Every engine requires certain functions to be able to run. Some of these functions rely on specific components to work and some components are part of more than one function so it is important to see the whole picture to be able to conclude anything about what may have failed. Also, these functions can ONLY be tested during the failure. Any other time and they will simply test good because the problem isn't present at the moment.
If you approach this in any other way, you are merely guessing and that only serves to replace unnecessary parts and wastes money.

Every engine requires spark, fuel and compression to run. That's what we have to look for.

These are the basics that need to be tested and will give us the info required to isolate a cause.

1) Test for spark at the plug end of the wire using a spark tester. If none found, check for power supply on the + terminal of the coil with the key on.

2) Test for injector pulse using a small bulb called a noid light. If none found, check for power supply at one side of the injector with the key on.

3) Use a fuel pressure gauge to test for correct fuel pressure, also noticing if the pressure holds when key is shut off.

4) If all of these things check good, then you would need to do a complete compression test.

Once you have determined which of these functions has dropped out,
you will know which system is having the problem.
Was this
answer
helpful?
Yes
No
Saturday, January 9th, 2016 AT 1:21 PM

Please login or register to post a reply.

Sponsored links