P2527 code meaning
Vacuum Reservoir Pressure Sensor Circuit Low
Powertrain system Generic code P25xx codes Check engine light
What P2527 means
P2527 means the signal from the vacuum reservoir pressure sensor has fallen below the lowest voltage a working sensor can produce. Whether low volts stand for deep vacuum or for atmospheric pressure depends on the sensor curve, but a reading at the floor is treated as an electrical fault, not as a vacuum value. Likely causes are a signal line shorted to ground, an open line on a sensor with pull-down, a missing 5 V reference, or a dead sensor. The 2004–2006 Dodge Sprinter is the documented case: FCA's emissions recall T21 names P2527 among the codes that may appear once the corrected engine software is installed; voltage thresholds were not published. P2528 is the high-side counterpart, P2526 a plausible voltage with an implausible value. Vacuum actuators may then run open-loop.
P2527 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2527
- Check engine light
- Boost or EGR control in default mode, less power
Common causes of P2527
- Most likelySignal wire shorted to ground
- Possible5 V reference open or pulled down
- PossibleSensor without output
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Vacuum reservoir pressure sensorSensor wiring
What each part of P2527 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 5 | Area: vehicle speed, idle control and auxiliary inputs. |
| 27 | The exact fault in that area. |
What to do next
- Note P2527 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2527
What does P2527 mean?
P2527 means "Vacuum Reservoir Pressure Sensor Circuit Low". P2527 means the signal from the vacuum reservoir pressure sensor has fallen below the lowest voltage a working sensor can produce. It is a generic code, so it means the same on every make.
Is it safe to drive with P2527?
Drive gently and only to a workshop. With P2527 the car can go into limp mode (reduced power) to protect itself.
Will P2527 fail an emissions test?
Yes, it can. P2527 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2527 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will P2527 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.