Boost pressure/temperature sensor (TMAP) 320/05558 JCB, aftermarket

Boost pressure/temperature sensor (TMAP) 320/05558 is an aftermarket part for the JCB machines.

The TMAP sensor measures intake manifold air pressure (boost) and air temperature in one body and passes them to the engine control unit, which works out the amount of air entering the engine from these two values and meters the fuel accordingly. According to sources, 320/05558 is a charge air pressure and temperature sensor made by Bosch for JCB engines, used on JCB backhoe loaders, telehandlers and wheeled loaders. A faulty sensor causes loss of power, black smoke, higher fuel use or engine limp mode. If its measuring tip is coated with oil and soot it reads wrongly; do not clean it with a stiff brush or compressed air.

Specifications

Compatibility

Other parts are in Sensors.

Fitting

Before the change, switch off the ignition and let the engine cool. Unplug the connector by pressing its latch, remove the sensor and clean its seat. Fit the O-ring or seal to the new sensor, tighten it to the specified torque and push the connector home until it locks. Start the engine and check the fault lamp does not come on, clearing fault codes with a diagnostic tool if needed.