P2744 Transmission Fluid Temperature Sensor B Circuit Intermittent

P2744 covers brief dropouts or jumps in the sensor B signal that do not last long enough for the steady low or high codes. No manufacturer documents P2744 publicly; the makers that do use sensor B (GM and Ford dual-clutch units, Mitsubishi Twin Clutch SST) file erratic readings under P2741 instead. By analogy, Ford's 2012 strategy for the main sensor names P0714 alongside open, short and in-range checks. CARB requires such inputs to be watched for wiring faults and for readings beyond their scale. Practical causes are a loose terminal in the gearbox connector, a chafed lead near hot or moving parts, or corrosion that only acts under vibration or heat. The fault often vanishes at the workshop, so freeze-frame data and wiggle tests matter.

Likely causes

Symptoms

• Warning lamp that comes and goes
• Short spikes in fluid temperature B on the scan tool

Repair estimate

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

Related codes

References: law.cornell.edu, newtonnet.co.uk, gsi.ext.gm.com.