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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Engine Control System & Fuel System - 4.6L - DTC P0351 To P2440) >> DTC P0641 or P0651 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

P0641 

  1. Observe the 5-volt reference 1 circuit status parameter with a scan tool. The scan tool should display OK.
  2. Engine running, observe the DTC information with a scan tool. DTC P0641 should not set.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

P0651 

  1. Observe the 5-volt reference 2 circuit status parameter with a scan tool. The scan tool should display OK.
  2. Engine running, observe the DTC information with a scan tool. DTC P0651 should not set.
  3. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
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