Fault Family System: Powertrain (P-Codes) 3 SAE Codes

Fuel Delivery Timing Error

Diagnostic & Technical Explanation

Code P0148 (Fuel Delivery Error) sets when the ECM determines that overall fuel delivery quantity or injection timing has deviated from the commanded values beyond a learned adaptation limit. Causes are worn or clogged injectors across multiple cylinders, a fuel pump unable to supply consistent pressure, or crank/cam timing reference drift.

These 3 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 3 times.

Codes in this family (3)

Code	Definition	Repair coverage
P0148	Fuel Delivery Error	3 ranked fixes
P0149	Fuel Timing Error	3 ranked fixes
P2A3E	Alternative Fuel Delivery Error	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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