DTC P1633: Keep Alive Power (KAPWR) Voltage Too Low
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2011 Mercury Milan, 2011 Mercury Mariner, 2011 Mercury Grand Marquis, 2011 Lincoln Town Car, and 2011 Lincoln Navigator L. However, it is still accessible from the selected car via links, so may be relevant.
P1633 - KEEP ALIVE POWER (KAPWR) VOLTAGE TOO LOW
| Description: | Indicates the KAPWR circuit has experienced a voltage interrupt. | ||
| Possible Causes: |
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| Diagnostic Aids: | Loss of KAPWR to the powertrain control module (PCM) results in immediate malfunction indicator lamp (MIL) illumination and sets DTC P1633. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST QB . | ||