Low Engine Oil Level Lamp Control Circuit (Chevrolet)
What does P1672 mean?
The P1672 code means the vehicle's onboard diagnostic system has detected: Low Engine Oil Level Lamp Control Circuit (Chevrolet). This is a moderate severity code.
Common Symptoms
- Low oil level warning light on
- Low oil level warning light inoperative
- Check Engine Light on
- Oil level gauge incorrect reading
- No warning when oil is actually low
Probable Causes (Ranked by Likelihood)
- Faulty oil level sensor in oil pan Very High
- Corroded wiring or connector at oil level sensor High
- Low engine oil level triggering legitimate warning Moderate
- PCM oil level lamp driver failure Low
Step-by-Step Diagnostic Procedure
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First check actual oil level with the dipstick. If low, add oil and clear the code.
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If oil level is correct, locate the oil level sensor in or on the oil pan and inspect the connector.
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Measure sensor circuit resistance per GM specifications.
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With ignition on, check for proper voltage signal from the sensor at the PCM connector.
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Command the oil level lamp on using a scan tool to verify the lamp and PCM driver work correctly.
Frequently Asked Questions
Should I check my oil even if the sensor seems faulty?
Absolutely. Always verify actual oil level with the dipstick regardless of sensor status. Running low on oil can cause catastrophic engine damage.
Is the oil level sensor hard to replace?
On most GM vehicles, the oil level sensor is in the oil pan and may require draining the oil or removing the oil pan for access.
Can I drive without a working oil level sensor?
Yes, but you must check your oil level manually with the dipstick regularly to ensure adequate lubrication.