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Fiat
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2021
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500X Sport
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Repair and Diagnosis
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Engine Performance
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System
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1.3L - DTCS P0121 To P02EE
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DTC Troubleshooting
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P018B-Fuel Pressure Sensor Circuit Performance
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Set Condition
Set Condition
If the PCM detects a sudden change in pressure greater than 29 psi +/- in the low pressure fuel system.