Code result
P27ED
Transmission Range Control A Position Sensor/Switch Circuit Low
High severity
What it means
The position sensor or switch of transmission range control channel A reports a circuit low condition. The TCM cannot verify the actuator position reliably.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Signal wire shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Internal short in position 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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