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ChevyTech · 10-30-2007, 11:33 AM

The 13, 14 and 34 are all low signal voltage issues. There is most likely one problem causing these codes. Test the charging system voltage and the power and grounds for the ECM. One wire with rubbed through insulation could be pulling the voltage down causing multiple codes. It is possible that the problem could be internal in the ECM.

The 41 could be the ECM, distributor module or the wiring in between the ECM and the distributor module.

Look carefully for corrosion on connections at the distributor module terminals, ECM terminals and all engine ground wires anywhere on the engine.

NOTE: ECM grounds usually terminate at the engine intake manifold area.

10-30-2007, 11:33 AM	#10
ChevyTech Registered User Join Date: May 2004 Location: Minnesota Posts: 4,621	Re: Code #41 and #55 The 13, 14 and 34 are all low signal voltage issues. There is most likely one problem causing these codes. Test the charging system voltage and the power and grounds for the ECM. One wire with rubbed through insulation could be pulling the voltage down causing multiple codes. It is possible that the problem could be internal in the ECM. The 41 could be the ECM, distributor module or the wiring in between the ECM and the distributor module. Look carefully for corrosion on connections at the distributor module terminals, ECM terminals and all engine ground wires anywhere on the engine. NOTE: ECM grounds usually terminate at the engine intake manifold area.