Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P1603 Cadillac code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
With the engine running engine speed over 500 rpm for 10 continuous seconds, the Powertrain Control Module (PCM) did not receive any Sensing Diagnostic Module (SDM) data or received invalid data during a 1 second period.
Need more information on how to fix the P1603 Cadillac code? Get Access to Factory Service Manuals
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