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Jerry
Jerry, Master Mechanic
Category: Car
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Experience:  ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
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2000 gmc: starts runs good but engine lite on

Resolved Question:

2000 gmc jimmy code P1351 .hard to start ,when starts runs good but engine lite on?
Submitted: 8 years ago.
Category: Car
Expert:  Jerry replied 8 years ago.
Hello and welcome to Just answer.com, Super mechanic here. About your vehicle.


That could just be the ignition module that is both problems, however, you will want to see what the fuel pressure is when you first turn the key on after it has not been running for some time.

Here is the test for the trouble code P1351



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DIAGNOSTIC AIDS
Intermittent test - If the connections and the harness check OK, monitor a DMM connected between VCM terminal C3 pin 9 and C4 pin 18 while moving related connectors and wiring harness. If the failure is induced, the voltage reading will change. This may help to isolate the location of the malfunction.

An intermittent may be caused by any of the following conditions:

  • A poor connection
  • Rubbed through wire insulation
  • A broken wire inside the insulation
Thoroughly inspect any circuitry that is suspected of causing the intermittent complaint. Refer to Testing for Intermittent and Poor Connections in Diagrams.
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