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.
Circuit Description
The control module calibrations are stored in the EEPROM when the ignition switch is turned OFF. When the ignition is first turned ON, the control module performs internal tests on the EEPROM to determine the integrity of this non-volatile memory. The control module compares its previously stored checksum with the checksum calculated when the ignition is first turned ON. If the two checksums do not match, the control module will indicate a calibration malfunction (checksum error) is current and set this DTC.
NO RELATED
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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.