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 MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 63 (CHARGING SYSTEM)DIAGNOSTIC TESTSDTC P0622: PULSE WIDTH MODULATED SIGNAL OUT-OF-RANGECONDITIONS FOR RUNNING DTC
2001 Chevrolet Cavalier LS, 2.4 T
Conditions For Running DTC
2001 Chevrolet Cavalier LS, 2.4 TSECTION Conditions For Running DTC
WARNING: This page is about a different car, the 2002 Pontiac Sunfire and 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
The following criteria must be met to enable DTC:
Key ON
- Test No generator, CKP sensors, or CMP sensor DTCs are set.
- The key is in the RUN position.
- The engine is not running.
Run Test
- No generator, CKP sensors, or CMP sensor DTCs are set.
- The engine is less than 3000 RPM.
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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.