P24B2: Particulate Matter Sensor Circuit Intermittent

Severity

Low

System

Powertrain

Last reviewed: Jan 1, 0001 Last updated: Jan 1, 0001

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P24B2 Mean?

P24B2 is a diagnostic trouble code indicating: Particulate Matter Sensor Circuit Intermittent. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P24B2

⚠️ Check Engine Light (MIL) illuminated
⚠️ Particulate Matter Sensor signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Reduced engine performance

Common Causes

🔍 Loose or intermittent connection at Particulate Matter Sensor
🔍 Wire chafing causing intermittent contact
🔍 Particulate Matter Sensor failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P24B2 mean?

P24B2 indicates: Particulate Matter Sensor Circuit Intermittent. The vehicle's computer has detected that the Particulate Matter Sensor is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P24B2?

Yes, P24B2 is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix P24B2?

Repair costs for P24B2 typically range from $30 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and reseat all Particulate Matter Sensor connectors
🔧 Repair chafed or damaged wiring in Particulate Matter Sensor circuit
🔧 Replace Particulate Matter Sensor if failing intermittently

1
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.