Conditions for Clearing the DTC
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
- The DTC can be cleared by using a scan tool.
DTC P1626
| Step | Action | Yes | No |
|---|---|---|---|
| 1 | Did you perform the Theft Deterrent Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Theft Deterrent |
| 2 |
IMPORTANT:
If a loss of DLC data has already been diagnosed, clear this DTC and continue diagnosis with Diagnostic System Check - Engine Controls
in Engine Controls - 5.7L. Is DTC P1631 set as a current code? |
Go to Diagnostic Trouble Code (DTC) List | Go to Step 3 |
| 3 | Inspect for poor connections at the harness connector of the powertrain control module (PCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 5 | Go to Step 4 |
| 4 |
IMPORTANT:
The replacement powertrain control module (PCM) must be programmed. Refer to Programming Theft Deterrent System Components . Replace the PCM. Refer to Powertrain Control Module (PCM) Replacement
in Engine Controls - 5.7L.Did you complete the replacement? |
Go to Step 5 | - |
| 5 |
|
Go to Step 2 | System OK |