P24B1 GMC Code - Particulate Matter Sensor Circuit High Voltage
Quick Answer
The Particulate Matter (PM) sensor monitors the amount of particulates (soot) in the diesel exhaust gas exiting the tailpipe. Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P24B1 GMC indicates Particulate Matter Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty Exhaust Particulate Matter Sensor, Exhaust Particulate Matter Sensor harness is open or shorted, Exhaust Particulate Matter Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P24B1 GMC Description
The operation of the PM Sensor is based on the electrical conductivity characteristic of the diesel particulate. As the exhaust gas flows over the sensing element, soot is absorbed in the combs between the electrodes, eventually creating a conductive path. When the path is formed, it generates a current based on the voltage being applied to the element. The measurement process continues until a preset current value is reached. To avoid misleading readings, the sensor performs a regeneration where the soot is cleaned off by heating up the element before the measurement phase begins. The amount of regenerations is based on vehicle strategy; when the calibrated number of regenerations is reached, the cumulative current readings are used to determine the amount of soot concentration in the exhaust gas which in turn determines the collection efficiency of the Diesel Particulate Filter (DPF). The Diagnostic Trouble Code (DTC) will be set when the particular matter sensor control unit detects an internal fault of the sensor, fault of the sensor circuitry, or low voltage on the sensor supply circuit.
What are the Possible Causes of the DTC P24B1 GMC?
- Faulty Exhaust Particulate Matter Sensor
- Exhaust Particulate Matter Sensor harness is open or shorted
- Exhaust Particulate Matter Sensor circuit poor electrical connection
How to Fix the DTC P24B1 GMC?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P24B1 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P24B1 GMC code?
Need more information on how to fix the P24B1 GMC code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P24B1 GMC code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P24B1 GMC Code
1. What are the common symptoms of OBDII code P24B1 GMC (Particulate Matter Sensor Circuit High Voltage)?
Symptoms may include poor engine performance, reduced fuel efficiency, exhaust smoke, and the illumination of the Check Engine light.
2. What are the possible causes of OBDII code P24B1 GMC?
Potential causes include a faulty particulate matter sensor, damaged wiring or connectors in the sensor circuit, issues with the diesel particulate filter, or a malfunctioning powertrain control module.
3. How can I diagnose the OBDII code P24B1 GMC?
Diagnosis typically involves using an OBDII scanner to retrieve the trouble codes, inspecting the particulate matter sensor and its connections, testing the sensor's voltage, and checking the diesel particulate filter for any obstructions.
4. Can I continue driving with OBDII code P24B1 GMC present?
It is not recommended to drive with this code present, as it can lead to further damage to the vehicle's emissions system and potentially worsen engine performance.
5. How do I repair OBDII code P24B1 GMC?
Repairs may involve replacing the particulate matter sensor, repairing or replacing damaged wiring or connectors, addressing issues with the diesel particulate filter, or reprogramming the powertrain control module.
6. Are there any maintenance tips to prevent OBDII code P24B1 GMC from recurring?
Regularly servicing the vehicle according to the manufacturer's recommendations, using high-quality diesel fuel, and driving the vehicle at highway speeds can help prevent issues related to the particulate matter sensor.
7. Can a DIY enthusiast fix OBDII code P24B1 GMC?
While some simple tasks like checking connections or inspecting the sensor can be done by a DIY enthusiast, diagnosing and repairing complex issues related to this code may require professional assistance.
8. How much does it cost to repair OBDII code P24B1 GMC?
Repair costs can vary depending on the specific cause of the code, the extent of the damage, and labor rates in your area. It's best to consult a mechanic for an accurate estimate.
9. Will resetting the Check Engine light resolve OBDII code P24B1 GMC?
Simply resetting the Check Engine light will not fix the underlying issue causing the code. It's important to diagnose and address the root cause of the problem to prevent the code from reoccurring.
10. Is OBDII code P24B1 GMC a serious issue?
Yes, it is a serious issue as it indicates a problem with the particulate matter sensor circuit, which can impact the vehicle's emissions, fuel efficiency, and overall performance. Addressing this code promptly is recommended.
Discuss the causes and fixes for P24B1 GMC OBDII Code
Code P24B1 GMC comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
