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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 105 (1.6L Engine - DTCS B2277 To P0131, Diagnostic Code Index, Pre-Diagnostic Troubleshooting Procedure & Intermittent Condition) >> Diagnosis And Testing >> P0123-Throttle Position Sensor Circuit N0.1 High >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2006 Chrysler PT Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
THROTTLE POSITION SENSOR SWEEP
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO (F855) 5 VOLT SUPPLY CIRCUIT
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
TP SENSOR INTERNAL FAILURE
(K922) SENSOR GROUND CIRCUIT OPEN
(K22) TP SENSOR NO.1 SIGNAL CIRCUIT OPEN
PCM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding.  (Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE)