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Home >> Jeep >> 2007 >> Grand Cherokee Laredo, 3.0 M >> Repair and Diagnosis >> Engine Performance >> System >> Diesel - DTCS P2010 To P2239 >> P2121-Accelerator Pedal Position Sensor 1 Performance >> Possible Causes
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Possible Causes

Possible Causes 
INTERMITTENT DTC
(F855) ACCELERATOR PEDAL POSITION SENSOR NO. 1 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K167) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO THE (F855) ACCELERATOR PEDAL POSITION SENSOR NO. 1 5 VOLT SUPPLY CIRCUIT
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO THE (F856) ACCELERATOR PEDAL POSITION SENSOR NO. 2 5 VOLT SUPPLY CIRCUIT
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO THE (K167) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SENSOR GROUND CIRCUIT
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO THE (K400) ACCELERATOR PEDAL POSITION SENSOR NO. 2 SENSOR GROUND CIRCUIT
(F855) ACCELERATOR PEDAL POSITION SENSOR NO. 1 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K167) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(F855) ACCELERATOR PEDAL POSITION SENSOR NO. 1 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K23) ACCELERATOR PEDAL POSITION SENSOR NO. 1 SIGNAL CIRCUIT SHORTED TO GROUND
ACCELERATOR PEDAL POSITION SENSOR
ENGINE CONTROL MODULE (ECM)

Always PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .