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2002 Chev Duramax

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valleybusman
User

Oct 3, 2017, 7:59 AM

Post #1 of 2 (1682 views)
2002 Chev Duramax Sign In
I have a 2002 Chev silverado 2500 HD with 158000 miles and an allison transmission . From time to time it would idle rough . Never did smoke or lose power . As far as I know there has never been any work done to the engine except an alternator and servicing oil changes . So I changed the fuel filter and put in some injector cleaner . Anyway when I checked for codes it came up with a P 1093 . Just what does the code mean > Is this something any shop can diagnose or do I need to take to a dealer ?


Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Oct 3, 2017, 10:14 AM

Post #2 of 2 (1658 views)
Re: 2002 Chev Duramax Sign In
Quote
The engine control module (ECM) uses the fuel rail pressure (FRP) sensor to determine fuel pressure to the fuel injectors. This is then compared to the calculated target fuel pressure as determined by the ECM. The ECM adjusts the FRP by modulating the duty cycle of the control driver of the fuel pressure regulator. Injector pulse duration is determined by the measured rail pressure and the target injection fuel into each cylinder. If a sensor circuit malfunction is detected, or the commanded fuel injection pump flow is not within the proper range for a given engine load and speed, DTC will be set.




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