Fault Family System: Powertrain (P-Codes) 15 SAE Codes

Fuel Pressure Sensor Circuit

Diagnostic & Technical Explanation

Code P018A (Fuel Pressure Sensor B Circuit) sets when the ECM sees an open, shorted, or out-of-range signal from a fuel pressure sensor used to monitor the low- or high-pressure fuel circuit. Causes are a failed sensor element, a corroded connector, or damaged sensor wiring.

These 15 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 15 times.

Codes in this family (15)

Code	Definition	Repair coverage
P018A	Fuel Pressure Sensor B Circuit	3 ranked fixes
P018B	Fuel Pressure Sensor B Circuit Range/Performance	3 ranked fixes
P018C	Fuel Pressure Sensor B Circuit Low	3 ranked fixes
P018D	Fuel Pressure Sensor B Circuit High	3 ranked fixes
P018E	Fuel Pressure Sensor B Circuit Intermittent/Erratic	3 ranked fixes
P01C3	Fuel Pressure Sensor A Circuit	3 ranked fixes
P01C4	Fuel Pressure Sensor A Circuit Range/Performance	3 ranked fixes
P01C5	Fuel Pressure Sensor A Circuit Low	3 ranked fixes
P01C6	Fuel Pressure Sensor A Circuit High	3 ranked fixes
P01C7	Fuel Pressure Sensor A Circuit Intermittent/Erratic	3 ranked fixes
P20DD	Exhaust Aftertreatment Fuel Pressure Sensor Circuit	3 ranked fixes
P20DE	Exhaust Aftertreatment Fuel Pressure Sensor Circuit Range/Performance	3 ranked fixes
P20DF	Exhaust Aftertreatment Fuel Pressure Sensor Circuit Low	3 ranked fixes
P20E0	Exhaust Aftertreatment Fuel Pressure Sensor Circuit High	3 ranked fixes
P20E1	Exhaust Aftertreatment Fuel Pressure Sensor Circuit Intermittent/Erratic	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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