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 MANUALSCHRYSLER2007ASPEN 4.7 P, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISDTCS P0335 TO P0506P0430-CATALYST EFFICIENCY (BANK 2)POSSIBLE CAUSES
2007 Chrysler Aspen 4.7 P, RWD
Possible Causes
2007 Chrysler Aspen 4.7 P, RWDSECTION Possible Causes
| Possible Causes |
|---|
| (K902) O2 RETURN UPSTREAM CIRCUIT SHORTED TO GROUND |
| (K904) O2 RETURN DOWNSTREAM CIRCUIT SHORTED TO GROUND |
| (K902) O2 RETURN UPSTREAM CIRCUIT OPEN |
| (K904) O2 RETURN DOWNSTREAM CIRCUIT OPEN |
| EXHAUST LEAK |
| ENGINE MECHANICAL CONDITION |
| AGING O2 SENSOR |
| CATALYTIC CONVERTER |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
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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.