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.
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HOMESERVICE MANUALSCHRYSLER1999CIRRUS L4-2.4L VIN XREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSGENERIC SCAN TOOL - REFERENCE INFORMATION4. CLEAR/RESET DTCS
1999 Chrysler Cirrus L4-2.4L VIN X
4. Clear/Reset DTCs
1999 Chrysler Cirrus L4-2.4L VIN XSECTION 4. Clear/Reset DTCs
MODE 4 - Clean Reset Emission-Related Diagnostic Information
Functional Description - The purpose of this test mode is to provide a means to command on-board modules to clear all emission-related diagnostic information. This includes the following:
a. Clear number of diagnostic trouble codes (Mode 1)
b. Clear diagnostic trouble codes (Mode 3)
c. Clear trouble code for freeze frame data (Mode 1)
d. Clear freeze frame data (Mode 2)
e. Clear oxygen sensor test data (Mode 5)
f. Reset status of system monitoring tests (Mode 1)
g. Clear on-board monitoring test results (Mode 6 and Mode 7)
h. Clear odometer mileage counter for accumulated distance traveled with MIL "ON" (Mode 1)
Since CARB allows other manufacturer-specific "cleaning/resetting" actions to occur in response to this request, the Chrysler Group has elected to impose additional requirements to dear ALL diagnostic information regardless of emission-related impact to facilitate ease of implementation.
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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.