P1844
Transmission Fluid Pressure Sensor/Switch 'A' Circuit Intermittent
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Incorrect gear shifting
- Gear slip
- Check Engine light comes on
- Jerks when shifting gears
- Switching to emergency mode of the gearbox
Causes
- Damage to the sensor wiring harness
- Poor contact in the sensor connector
- Malfunction of the pressure sensor itself
- Circuit Grounding Problems
- Transmission control module (TCM) malfunction
How to Fix
- Check the integrity of the sensor wiring harness
- Clean and check the contacts in the sensor connector
- Check sensor resistance and reference voltage
- Replace transmission fluid pressure sensor if necessary
- Check TCM operation