Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
This Diagnostic Trouble Code (DTC) may set in high ambient temperature conditions when the correct oil type (viscosity) is being used in the Engine. If correct oil viscosity is used, but the code keeps coming back, reprogramming (refreshing) the Powertrain Control Module (PCM) will take care of the problem.
To diagnose the P1521 Dodge code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.
Using the oil pressure, oil temperature and other vital engine inputs the Powertrain Control Module (PCM) can determine the engine oil viscosity. Incorrect viscosity will affect the operation of the MDS by delaying cylinder activation. The Diagnostic Trouble Code (DTC) will set when the PCM has detected an incorrect engine oil viscosity.
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