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HOMESERVICE MANUALSCHEVROLET1996FORWARD CONTROL 6.5 Y, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - TESTS W/CODES - P SERIES (6.5L DIESEL)DIAGNOSTIC TROUBLE CODESDTC P1216 - FUEL SOLENOID RESPONSE TIME TOO SHORTDIAGNOSTIC PROCEDURES
1996 Chevrolet Forward Control 6.5 Y, Automatic

Diagnostic Procedures

1996 Chevrolet Forward Control 6.5 Y, AutomaticSECTION Diagnostic Procedures
  1. Perform Powertrain On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
  2. Check if DTC P0219 is set. If DTC P0219 is set, go to DTC P0219. If DTC P0219 is not set, go to next step.
  3. Check if engine starts. If engine starts, go to next step. If engine does not start, go to step 7).
  4. With engine at normal operating temperature, using scan tool, observe injection pump closure time. If scan tool displays injection pump closure time less than .75 millisecond, go to next step. If scan tool displays injection pump closure time greater than .75 millisecond, go to step 6).
  5. With engine running, using scan tool, observe injection pump closure time. If scan tool displays injection pump closure time as 0.0 milliseconds, go to step 8). If scan tool does not display injection pump closure time as 0.0 millisecond, go to step 10).
  6. DTC is intermittent. If no additional DTCs are set, see DIAGNOSTIC AIDS. If any additional DTCs are set, go to applicable DTC test.
  7. Check for open in closure ground circuit. Repair as necessary. Go to step 12).
  8. Check for open or short to ground in closure signal circuit. Repair as necessary. If a problem was found, go to step 12). If a problem was not found, go to next step.
  9. Check for poor connection at closure signal terminal of PCM. Repair terminal as necessary. If terminal was replaced, go to step 12). If terminal was not replaced, go to next step.
  10. Replace fuel injection pump. If fuel injection pump is replaced, new pump must be timed. See appropriate ADJUSTMENTS article. Go to step 12).
  11. Replace PCM. Go to next step.
  12. Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter DTC P1216. Operate vehicle within the conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step 2).
  13. Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTC(s) are displayed, go to applicable DTC test.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.