Particulate Matter Sensor Circuit Range/Performance Problem
Indicates a problem with the diesel particulate matter sensor circuit.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The system is monitoring the amount of soot in the exhaust, and it's not reading right, which can mean the sensor is faulty or there's an issue with the wiring.
What the computer is actually seeing
The engine control module (ECM) checks the particulate matter sensor's voltage signal, which should fluctuate between 0.5V and 2.5V based on the soot levels. If it detects a voltage outside this range, it sets a code.
What a healthy reading looks like
Voltage should be between 0.5V and 2.5V when monitoring soot levels; below 0.5V or above 2.5V is problematic.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors at the particulate matter sensor for damage or corrosion. Repair as needed.
- 22. Measure the voltage at the sensor while the vehicle is running. Look for a range between 0.5V and 2.5V.
- 33. If voltage is outside expected values, check for a short or open circuit in the wiring leading to the ECM.
- 44. If wiring is good, replace the particulate matter sensor and clear the code.
- 55. Recheck the system after replacement to see if the code returns.
Common causes
- Faulty particulate matter sensor
- Wiring or connector issues in the sensor circuit
- Contaminated sensor due to soot buildup
- ECM calibration issues
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I drive with this code active?
Yes, you can drive, but it's not recommended for long periods as it can affect emissions.
Will the code come back after fixing?
If the root cause is addressed, typically the code won't return.
Why does this code appear with other codes?
Issues with the particulate matter sensor can also affect related systems, hence multiple codes.
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