Code p0102, no start?

2007 CADILLAC CTS
200,000 MILES • 2.8L • V6 • 2WD • AUTOMATIC
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LEYNA07830
  • MEMBER
  • 6 POSTS
Been having trouble getting car to start need repair guide to help me check if I'm getting spark in spark plugs, or maybe how to check my battery using multimeter and checking if maybe it's my crankshaft sensor trouble code received is p0102.
Jun 5, 2023 at 7:43 PM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Hi,

I will provide the info requested, but I feel the problem is related to the mass airflow sensor (MAF). That is what the code is indicating.

Do me a favor. The air induction tube between the air filter box and the throttle body has the MAF sensor in it. Disconnect the sensor and see if it starts. See pic below

Let me know.

Also, here is a link to test the alternator using a multimeter:

https://www.2carpros.com/articles/how-to-check-a-car-alternator

If the engine starts (hard start), you are getting spark to the plugs. However, here is a link that explains how to check for spark:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Let me know what happens with the MAF disconnected.

Take care,

joe

See pic below.
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Jun 5, 2023 at 9:57 PM
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