Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Particulate Matter Bank 1, Sensor 1 (PM11) Module
The PM11 module monitors the PM11 sensor and controls the PM11 sensor heater element. The PM11 module communicates with the PCM through the controller area network (CAN) to report the presence of particulates in the exhaust gas, indicating a concern with the diesel particulate filter.
The PM11 module consists of a microprocessor, RAM, ROM, EEPROM, and heater driver. The EEPROM stores the module calibration. The heater driver supplies a pulse width modulated (PWM) voltage to the heater portion of the sensor to clean and regenerate the sensor element. The microprocessor processes all of the inputs from the sensor and communicates the information to the PCM.
The PM11 module is located on the right hand frame rail downstream of the diesel particulate filter.
Typical PM11 Module
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.