Code result
P2527
Vacuum Reservoir Pressure Sensor Circuit Low
Moderate severity
What it means
Sensor signal voltage below the lower limit — usually a short to ground or open reference. The ECM disables vacuum pump control until the input recovers.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Signal wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Missing 5 V reference at the sensor
mediumA plausible cause — test and verify before replacing parts.
Connector pins corroded - high contact resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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