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.
Powertrain Control Module (PCM) Reset
2006 Mazda B2300 L4-2.3L VIN DSECTION Powertrain Control Module (PCM) Reset
Powertrain Control Module (PCM) Reset
Description
All OBD II scan tools support the PCM reset.
The PCM reset allows the scan tool to command the PCM to clear all emission-related diagnostic information. When resetting the PCM, a DTC P1000 will be stored in the PCM until all the OBD II system monitors or components have been tested to satisfy a drive cycle, without any other faults occurring. For more information about a drive cycle, See DRIVE CYCLES. Monitors, Trips, Drive Cycles and Readiness Codes
The following events occur when a PCM reset is performed :
- clears the number of DTCs
- clears the DTCs
- clears the freeze frame data
- clears diagnostic monitoring test results
- resets status of the OBD II system monitors
- sets DTC P1000
NOTE: When using the WDS or equivalent tester to perform a PCM reset, press the CLEAR button. This function is performed only after retrieval of continuous DTCs.
Description
All OBD II scan tools support the PCM reset.
The PCM reset allows the scan tool to command the PCM to clear all emission-related diagnostic information. When resetting the PCM, a DTC P1000 will be stored in the PCM until all the OBD II system monitors or components have been tested to satisfy a drive cycle, without any other faults occurring. For more information about a drive cycle, See DRIVE CYCLES. Monitors, Trips, Drive Cycles and Readiness Codes
The following events occur when a PCM reset is performed :
- clears the number of DTCs
- clears the DTCs
- clears the freeze frame data
- clears diagnostic monitoring test results
- resets status of the OBD II system monitors
- sets DTC P1000
NOTE: When using the WDS or equivalent tester to perform a PCM reset, press the CLEAR button. This function is performed only after retrieval of continuous DTCs.
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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.