P2742

Transmission Fluid Temperature Sensor B Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Incorrect gear shifting
Check Engine Light Illuminates
Reduced transmission efficiency
It is possible to switch to emergency mode of operation of the gearbox

Causes

Transmission Fluid Temperature Sensor B Malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Transmission control module (TCM) malfunction

How to Fix

Check the continuity of the transmission fluid temperature sensor B
Check sensor connectors and connections
Check sensor resistance according to specifications
Replace transmission fluid temperature sensor B if necessary
Check and, if necessary, replace the transmission control module (TCM)

Related codes

P2740 P2741 P2743