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04-02-2011, 08:56 PM
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#1 |
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Registered User
Join Date: Jul 2009
Location: Daytona Beach, Fl
Posts: 7
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Re: 2001 HD 8.1 Problem
The tranny code is p10781 engine torgue signal circuit, only shows up occasionally. I just put an exhaust on it and and removed teh catalytic converters. The 02 sensors that are normally behind the cats were plugged off I'm assuming by the factory cuz I've never done it. I thought the converters were causing my problem but removing them and putting in a magnaflow exhaust hasnt helped it. Is this condition similar to what happens with bad crank or cam sensors?
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04-03-2011, 12:05 AM
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#2 | |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 2001 HD 8.1 Problem
Quote:
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04-04-2011, 06:52 AM
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#3 |
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Registered User
Join Date: Jul 2009
Location: Daytona Beach, Fl
Posts: 7
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Re: 2001 HD 8.1 Problem
It's P1781,
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04-04-2011, 09:59 AM
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#4 |
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Senior Member
Join Date: May 2009
Location: Fort Worth, TX
Posts: 6,370
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Re: 2001 HD 8.1 Problem
I would investigate that code some more, The Allison TCM/wiring can cause drivability problems, Fuel system problems can also set this code.
Vehicle Application: 2001 Chevrolet Silverado 2500 HD 8.1L, GAS, Vin G Customer Concern: Very intermittent loss of power. OK at this time. Electronic Control Module (ECM) codes: P1571, P1781, P0700. Tests/Procedures: 1. Check for Transmission Control Module (TCM) codes. 2. Check the condition of the requested torque signal wire, Orange/Black, circuit #463, between the ECM, pin 13 of the blue connector and TCM, pin 22 of the gray connector. 3. If the wire checks OK, try updating the ECM calibration per bulletin #01-06-04-020. 4. Monitor the fuel pressure while driving. 5. Clean the MAF sensor and fuel injectors. Potential Causes: Miscalibrated Electronic Control Module (ECM) Fuel Injector(s) Fuel Pump Mass Air Flow (MAF) Sensor Transmission Control Module (TCM) Transmission Control Module (TCM) Wiring |
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