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Home >> Chevrolet >> 1998 >> Forward Control P30, 6.5 F, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Controls - Tests W/Codes - 7.4L) >> Diagnostic Trouble Codes >> DTC P0507 - Idle Control System High Rpm >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Install scan tool. Check if any other DTCs are set. If other DTCs are not set, go to next step. If other DTCs are set, go to that DTC test.
  3. Check if DTC P0507 is active this ignition cycle. If DTC P0507 is active this ignition cycle, go to step 5). If DTC P0507 is not active this ignition cycle, go to next step.
  4. DTC is intermittent. Check if additional DTCs are set. Diagnose affected DTCs. If no additional DTCs are set, see DIAGNOSTIC AIDS.
  5. Problem is engine mechanical related. Repair as necessary. After repairs, go to step 7).
  6. Using scan tool, clear codes. Start engine. Idle at operating temperature. Select SPECIFIC DTC for this DTC. Operate vehicle under conditions which originally set DTC. If scan tool indicates DTC test has run and passed, go to next step. If scan tool does not indicate that this DTC test has ran and passed, go to step 2).
  7. Using scan tool, select CAPTURE INFO function. Review stored info. If other DTCs are stored, go to applicable DTC. If no other DTCs are set, system is okay.
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