Possible causes – Faulty spark plug 11– Clogged or faulty fuel injector 11– Faulty ignition coil 11– Fuel injector 11 harness is open or shorted– Fuel injector 11 circuit poor electrical connection– Ignition coil 11 harness is open or shorted–

Possible causes – Faulty spark plug 12– Clogged or faulty fuel injector 12– Faulty ignition coil 12– Fuel injector 12 harness is open or shorted– Fuel injector 12 circuit poor electrical connection– Ignition coil 12 harness is open or shorted–

Possible causes – Faulty spark plug 2– Clogged or faulty fuel injector 2– Faulty ignition coil 2– Fuel injector 2 harness is open or shorted– Fuel injector 2 circuit poor electrical connection– Ignition coil 2 harness is open or shorted–

Possible causes – Faulty spark plug 3– Clogged or faulty fuel injector 3– Faulty ignition coil 3– Fuel injector 3 harness is open or shorted– Fuel injector 3 circuit poor electrical connection– Ignition coil 3 harness is open or shorted–

Possible causes – Faulty spark plug 4– Clogged or faulty fuel injector 4– Faulty ignition coil 4– Fuel injector 4 harness is open or shorted– Fuel injector 4 circuit poor electrical connection– Ignition coil 4 harness is open or shorted–

Possible causes – Faulty spark plug 5– Clogged or faulty fuel injector 5– Faulty ignition coil 5– Fuel injector 5 harness is open or shorted– Fuel injector 5 circuit poor electrical connection– Ignition coil 5 harness is open or shorted–

Possible causes – Faulty spark plug 6– Clogged or faulty fuel injector 6– Faulty ignition coil 6– Fuel injector 6 harness is open or shorted– Fuel injector 6 circuit poor electrical connection– Ignition coil 6 harness is open or shorted–

Possible causes – Faulty spark plug 7– Clogged or faulty fuel injector 7– Faulty ignition coil 7– Fuel injector 7 harness is open or shorted– Fuel injector 7 circuit poor electrical connection– Ignition coil 7 harness is open or shorted–

Possible causes – Faulty spark plug 8– Clogged or faulty fuel injector 8– Faulty ignition coil 8– Fuel injector 8 harness is open or shorted– Fuel injector 8 circuit poor electrical connection– Ignition coil 8 harness is open or shorted–

Possible causes – Faulty spark plug 9– Clogged or faulty fuel injector 9– Faulty ignition coil 9– Fuel injector 9 harness is open or shorted– Fuel injector 9 circuit poor electrical connection– Ignition coil 9 harness is open or shorted–

Possible causes – Faulty Speed Sensor– Speed Sensor harness is open or shorted– Speed Sensor circuit poor electrical connection When is the code detected? Diagnostic trouble code is detected when Transmission Control Module (TCM) does not receive the proper voltage

Possible causes – Faulty Speed Sensor– Speed Sensor harness is open or shorted– Speed Sensor circuit poor electrical connection When is the code detected? The output shaft speed sensor failed to provide a signal to the TCM upon initial movement

Possible causes – Faulty Speed Sensor– Speed Sensor harness is open or shorted– Speed Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Speedometer improper reading– Possible shifting problems P0721 VOLKSWAGEN Description The

Possible causes – Faulty throttle pedal position sensor– Throttle pedal position sensor harness is open or shorted– Throttle pedal position sensor circuit poor electrical connection When is the code detected? An excessively low voltage from the Throttle Pedal Position (TPP)

Possible causes – Faulty Throttle Position Sensor (TPS)– Throttle Position Sensor (TPS) harness is open or shorted– Throttle Position Sensor (TPS) circuit poor electrical connection When is the code detected? An excessively high voltage from the Throttle Position Sensor (TPS)

Possible causes – Faulty Throttle Position Sensor (TPS)– Throttle Position Sensor (TPS) harness is open or shorted– Throttle Position Sensor (TPS) circuit poor electrical connection When is the code detected? An excessively low voltage from the Throttle Position Sensor (TPS)

Possible causes – Faulty Throttle Position Sensor (TPS)– Throttle Position Sensor (TPS) harness is open or shorted– Throttle Position Sensor (TPS) circuit poor electrical connection When is the code detected? An out of range voltage from the Throttle Position Sensor

Possible causes – Faulty Throttle Position Sensor (TPS)– Throttle Position Sensor (TPS) harness is open or shorted– Throttle Position Sensor (TPS) circuit poor electrical connection When is the code detected? An unexpected voltage from the Throttle Position Sensor (TPS) is

Possible causes – Faulty Throttle Position Sensor– Throttle Position Sensor circuit is open or shorted– Throttle Position Sensor poor electrical connection When is the code detected? Malfunction is detected when an excessively low or high voltage from the sensor is

Possible causes – Faulty throttle position sensor– Throttle position sensor harness is open or shorted– Throttle position sensor circuit poor electrical connection When is the code detected? An excessively high voltage from the Throttle Pedal Position (TPP) Sensor is sent