Fault Family System: Powertrain (P-Codes) 8 SAE Codes

EGR Cooler Coolant Pump

Diagnostic & Technical Explanation

Code P24A7 (EGR Cooler Coolant Pump Control Circuit/Open) sets when the ECM detects an open circuit, out-of-range current, a stuck-on/stuck-off performance fault, or an implausible feedback signal while driving the auxiliary electric coolant pump that circulates coolant through the EGR cooler to control its temperature. Causes are a seized pump impeller from scale buildup, a failed pump motor winding, or corroded connectors at the pump or its feedback sensor.

These 8 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 8 times.

Codes in this family (8)

Code	Definition	Repair coverage
P24A7	EGR Cooler Coolant Pump Control Circuit/Open	3 ranked fixes
P24A8	EGR Cooler Coolant Pump Performance/Stuck Off	3 ranked fixes
P24A9	EGR Cooler Coolant Pump Control Circuit Low	3 ranked fixes
P24AA	EGR Cooler Coolant Pump Control Circuit High	3 ranked fixes
P24AB	EGR Cooler Coolant Pump Stuck On	3 ranked fixes
P24AC	EGR Cooler Coolant Pump Feedback Circuit Low	3 ranked fixes
P24AD	EGR Cooler Coolant Pump Feedback Circuit High	3 ranked fixes
P24D4	EGR Cooler Coolant Pump Feedback Circuit	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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