Shift Pointers
- Author: Wayne Colonna
- Subject Matter: 2012 Hyundai Sonata with A6MF2
- Issue: Rough shifts
A 2012 Hyundai Sonata using a 2.4L engine and an A6MF2 transmission comes in to Covington Automotive with erratic and harsh shifts. When the vehicle was scanned for codes, transmission-fluid temperature-sensor codes P0711 and P0713 were stored. P0711 is a rationality check code while P0713 is a circuit high- input code.
This temperature sensor is on the valve body (Figure 1) and has been problematic. The sensor (Figure 2) could be unplugged from the harness (Figure 3) and at one time could be replaced as a separate item under part number 46386 3B900 for around $22 (Figure 4).
The temperature sensor has now been integrated with the internal ribbon harness since early March of 2013 (Figure 5).
As a result, the temperature sensor is no longer available as a separate item. A new entire harness (part number 46307 3B050) with the temperature sensor lists for about $100 and wholesales for around $75 (Figure 6).
In one sense this can be a better deal in that the ribbon harness is known to be an issue and not the sensor itself. When the sensor could be purchased separately for $22, if you needed the harness assembly as well, it cost around $155. Between the two you would spend near $180 whereas now it is less than half that price.
When Donald Holliday installed the new wire-harness assembly and sensor, the vehicle was repaired and returned to a normal shift schedule.
