Code result
P0842
Transmission Fluid Pressure Sensor/Switch A Circuit Low
Moderate severity
What it means
The transmission fluid pressure sensor A circuit reports voltage below threshold, indicating short to ground or sensor failure.
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 shorted to ground
highOne of the most commonly reported causes for this code — check this first.
Sensor failed
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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