P1623
Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions
P1623 is an OBD-II diagnostic trouble code meaning: Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions. Common causes: open or short circuit in the sensor circuit, pull-up resistor failure. Estimated repair cost: $17–56.
Symptoms
- Incorrect gear shifting
- Transmission of the gearbox into emergency mode
- Check Engine Light Illuminates
- Increased fuel consumption
- Reduced vehicle dynamics
Causes
- Open or short circuit in the sensor circuit
- Pull-up resistor failure
- Wiring harness damage
- Failure of the transmission fluid temperature sensor
- Connector problems or contact corrosion
How to Fix
- Check the continuity of the transmission fluid temperature sensor circuit
- Check the resistance of the pull-up resistor
- Inspect connectors and wiring harness for damage
- Replace the transmission fluid temperature sensor if necessary
- Clean connector contacts from corrosion
Related codes
Error P1623 by Vehicle Brand
FAQ
What does the P1623 code mean?
P1623 is an OBD-II diagnostic trouble code that indicates: Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions
What causes a P1623 error code?
The most common causes of P1623 include: Open or short circuit in the sensor circuit; Pull-up resistor failure; Wiring harness damage; Failure of the transmission fluid temperature sensor.
How do I fix a P1623 diagnostic trouble code?
To fix P1623: Check the continuity of the transmission fluid temperature sensor circuit. Check the resistance of the pull-up resistor. Inspect connectors and wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P1623?
Limited driving only, diagnose soon
How much does it cost to fix P1623?
The estimated repair cost for P1623 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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