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.
1995 Cadillac Eldorado BaseFACTORY OEM SERVICE PROCEDURE
Code P025, 24X Reference Signal Low: Action
PCM turns on SERVICE VEHICLE SOON light message.
NOTE:
Test numbers refer to numbers on diagnostic chart.
- Checks to see if Code P035 is present because REF LO problem can cause other ignition problems.
- Checks ability of ignition control module to produce 24X reference pulses. If system is operating correctly, reading will be 200 Hertz or greater.
- Checks to see if ICM is providing PCM the proper 24X reference signal.
- Checks for open or short to ground in circuit No. 647.
Factory Service Tools
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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.