P27E8 code meaning
Transmission Range Control B Circuit Performance
Powertrain system Generic code P27xx codes Check engine light
What P27E8 means
P27E8 is the plausibility test for range control circuit B: the signal is neither open nor shorted, yet its value makes no sense, for example a level stuck between the valid on and off windows. The title reads Circuit Performance, without Range. No manufacturer publishes the code. Mitsubishi's 2022 shift-by-wire CVT shows the A version, P07E9: a selector sensor voltage sitting for 2.4 s in a forbidden band (such as 2.12 to 2.67 V) counts as a fault, with no fail-safe action because the other sensors still identify the position. A second channel would be judged the same way. Contact resistance, moisture in the selector or an aging Hall element are the likely sources. Open, low and high are P27E7, P27E9 and P27EA.
P27E8 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P27E8
- Intermittent shift system warning
- Displayed range occasionally flickers or lags
Common causes of P27E8
- Most likelyContact resistance at selector terminals shifting the voltage
- PossibleSpilled drink or moisture inside the selector
- PossiblePosition sensor in the selector degrading
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Transmission range control actuator bWiring harnessTCM
What each part of P27E8 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| E8 | The exact fault in that area. |
What to do next
- Note P27E8 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 P27E8
What does P27E8 mean?
P27E8 means "Transmission Range Control B Circuit Performance". P27E8 is the plausibility test for range control circuit B: the signal is neither open nor shorted, yet its value makes no sense, for example a level stuck between the valid on and off windows. It is a generic code, so it means the same on every make.
Is it safe to drive with P27E8?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P27E8 fail an emissions test?
P27E8 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P27E8 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P27E8 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.