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Home >> Saab >> 2003 >> 9-3 SE, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (TRIONIC T7 Fuel Control System) >> Fault diagnosis, fault codes >> DTC P1231: Throttle Position Sensor 1 and 2 Circuit Sum Out of Range (No Limp Home) >> Technical explanation

Technical explanation

WARNING: This page is about a different car, the 2001 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

The cause of the problems is one of the potentiometers (pot.1) in the throttle body. The throttle will then make brief movements in the closing direction. In this case, irregular idling may be noticeable or there may be surging when driving on motorways. The fault is not significant from a safety standpoint and does not affect exhaust emission control.

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