P1663 Cadillac Code - Change Oil Lamp Control Circuit Conditions
Quick Answer
With the engine speed over 600 rpm, the Powertrain Control Module (PCM) detects that commanded state of the Change Oil Lamp driver and the Actual state of the control circuit did not match for over 5 seconds. Common causes include Faulty Change Oil Lamp, Change Oil Lamp harness is open or shorted, Change Oil Lamp circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P1663 Cadillac indicates Change Oil Lamp Control Circuit Conditions.
- Common causes
- Common causes include Faulty Change Oil Lamp, Change Oil Lamp harness is open or shorted, Change Oil Lamp circuit poor electrical connection.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P1663 Cadillac Description
What are the Possible Causes of the DTC P1663 Cadillac?
- Faulty Change Oil Lamp
- Change Oil Lamp harness is open or shorted
- Change Oil Lamp circuit poor electrical connection
How to Fix the DTC P1663 Cadillac?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1663 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1663 Cadillac Code
1. What does the OBDII code P1663 mean on a Cadillac?
P1663 indicates an issue with the Change Oil Lamp Control Circuit, which is responsible for turning the "Change Oil" warning light on or off.
2. What are the common symptoms of the P1663 code?
Symptoms include the "Change Oil" light staying on, not illuminating when expected, or erratic behavior of the warning light.
3. What causes the P1663 code in a Cadillac?
Common causes include a faulty oil life monitor module, damaged wiring or connectors in the control circuit, or a malfunctioning instrument cluster.
4. Can a low oil level trigger the P1663 code?
No, the P1663 code is related to the control circuit, not the oil level. However, it’s always a good idea to check the oil level as part of regular maintenance.
5. How do I diagnose the P1663 code?
Diagnosis involves inspecting the wiring and connectors for damage, testing the control circuit with a multimeter, and checking the oil life monitor module for faults.
6. Is it safe to drive with the P1663 code?
Yes, but it’s advisable to address the issue promptly, as the malfunction may prevent you from receiving timely oil change reminders.
7. How is the P1663 code fixed?
Repairs may include replacing damaged wiring or connectors, repairing or replacing the oil life monitor module, or recalibrating the system as needed.
8. Can I reset the P1663 code by clearing it with a scan tool?
Clearing the code with a scan tool may temporarily turn off the warning, but the underlying issue must be addressed to prevent the code from returning.
9. How much does it cost to fix the P1663 code in a Cadillac?
Repair costs vary depending on the exact issue but generally range from $50 to $250 for diagnostics and repairs.
10. Does the P1663 code affect the engine’s performance?
No, the P1663 code does not directly impact engine performance but may affect the accuracy of oil change reminders.
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