Engine-Codes - Generic - P1623

P1623 Code - Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions

- Code Popularity: 15,566 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1623?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Transmission Fluid Temperature (TFT)
  • Transmission Fluid Temperature (TFT) harness is open or shorted
  • Transmission Fluid Temperature (TFT) circuit poor electrical connection
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How to Fix the DTC P1623?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P1623 code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P1623 Code Mean?

With the cold engine startup completed, engine running, the Powertrain Control Module (PCM) detects a fault in the PCM pull-up resistor used to revise Engine Coolant Temperature (ECT) resolution throughout the complete engine operating range.

P1623 Code - Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions

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Code P1623 Information for Specific Makes

  • P1623 Audi CAN Data Bus No Signal
  • P1623 Buick Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions
  • P1623 Cadillac Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions
  • P1623 Chevrolet Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions
  • P1623 GMC Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions
  • P1623 Hyundai Radiator Cooling Fan Malfunction
  • P1623 KIA Malfunction Indicator Lamp Open /Short
  • P1623 Mazda Engine Control Module Immobilizer Read / Write Error EEPROM Damaged
  • P1623 Nissan Injector Adjustment Value
  • P1623 Saab CAN Data Bus Transmission Control Module
  • P1623 Volkswagen CAN Data Bus No Signal

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