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

PM Sensor Circuit

Diagnostic & Technical Explanation

Code P24AE (Particulate Matter Sensor Circuit) sets when the ECM sees an open, shorted, out-of-range, or intermittent signal from the soot-sensing particulate matter (PM) sensor downstream of the DPF used to confirm the filter is not passing untreated soot, including its supply-voltage circuit and a regeneration-incomplete flag that prevents the sensor's self-cleaning burn cycle from finishing. Causes are excessive soot accumulation on the sensing element from a leaking upstream filter, a corroded connector, or a failed sensor element.

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
P24AE	Particulate Matter Sensor Circuit	3 ranked fixes
P24AF	Particulate Matter Sensor Circuit Range/Performance	3 ranked fixes
P24B0	Particulate Matter Sensor Circuit Low	3 ranked fixes
P24B1	Particulate Matter Sensor Circuit High	3 ranked fixes
P24B2	Particulate Matter Sensor Circuit Intermittent	3 ranked fixes
P24D0	Particulate Matter Sensor Supply Voltage Circuit Low	3 ranked fixes
P24D1	Particulate Matter Sensor Regeneration Incomplete	3 ranked fixes
P24DA	Particulate Matter Sensor Exhaust Sample Error Bank 1	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)

Need All 15,886 Codes as Data?

Pipe-delimited CSV, Apache Parquet and a relational SQLite database, with commercial application rights and instant download. Built for scan tools, shop software and research - not assembled one web page at a time.

License OEM Complete · $149 Standard (SAE only) · $49

$49 Standard: 9,249 SAE codes · $149 OEM Complete: all 15,886 codes, including 6,637 OEM codes across 32 makes · $149 Heavy Duty: 4,212 fault pairs (J1939) · one-time · compare tiers