Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 1 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 1 Sensor 2 circuit open shorted to ground– Heated Oxygen Sensor (H2OS) Bank

Possible causes – Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 circuit fuse– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1 harness is open shorted to ground– Heated Oxygen Sensor (H2OS)

Possible causes – Faulty Ignition Coil 1– Ignition Coil 1 harness is open or shorted– Ignition Coil 1 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 2– Ignition Coil 2 harness is open or shorted– Ignition Coil 2 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 3– Ignition Coil 3 harness is open or shorted– Ignition Coil 3 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 4– Ignition Coil 4 harness is open or shorted– Ignition Coil 4 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 5– Ignition Coil 5 harness is open or shorted– Ignition Coil 5 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil 6– Ignition Coil 6 harness is open or shorted– Ignition Coil 6 circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the code detected? Each ignition circuit is continuously monitored by the

Possible causes – Faulty Ignition Coil– Ignition Coil harness is open or shorted– Ignition Coil circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0725 HONDA Description The Transmission Control Module (TCM) monitors the

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? – An excessively high

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? An excessively low or

Possible causes – Faulty Intake Air Temperature (IAT) sensor– Dirty air filter– Intake Air Temperature (IAT) sensor harness is open or shorted– Intake Air Temperature (IAT) sensor circuit poor electrical connection When is the code detected? An excessively low voltage

Possible causes – Faulty Intake Air Temperature sensor– Intake Air Temperature sensor harness is open or shorted– Intake Air Temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a high voltage

Possible causes – Faulty Intake Air Temperature sensor– Intake Air Temperature sensor harness is open or shorted– Intake Air Temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a low voltage

Possible causes – Faulty Intake Air Temperature sensor– Intake Air Temperature sensor harness is open or shorted– Intake Air Temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected a performance fault

Possible causes – Faulty Intake Manifold Runner Control (IMRC)– Intake Manifold Runner Control harness is open or shorted– Intake Manifold Runner Control circuit poor electrical connection When is the code detected? If the output voltage from the Intake Manifold Runner

Possible causes – Faulty Intake Manifold Runner Control (IMRC)– Intake Manifold Runner Control harness is open or shorted– Intake Manifold Runner Control circuit poor electrical connection When is the code detected? If the output voltage from the Intake Manifold Runner

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0325 code means that the Knock Sensor is not working properly. Problems with

Possible causes – Faulty knock sensor– Knock sensor circuit poor electrical connection– Knock sensor harness is open or shorted– Faulty Engine Control Module (ECM) Tech notes The P0325 code means that the Knock Sensor is not working properly. Problems with