Check engine light, code PO330

Good morning.

The code is for the knock sensor. This is a common code and usually it is either the wire harness connectors to the sensors or the sensor itself. You need a advanced scan tool to monitor the live data for the sensor. I attached a description below and instructions on how to get to the sensors. The sensors are located under the lower intake manifold in the center of the engine.

Roy

DTC P0330 - Left Bank Knock Sensor Circuit Malfunction

INSPECTION PROCEDURE

1. Connect the OBDII scan tool or TOYOTA hand-held tester and check the Knock Sensor circuit.
- Remove the fuse cover on the instrument panel.

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- Connect the OBDII scan tool or TOYOTA hand-held tester to the Data Link Connector 3.
- Disconnect the wire to wire connector EE1.
- Connect the terminals of the disconnected EE1 male connector and EE1 female as follows:
Male connector of Terminal 1 to Female connector of Terminal 2.
Male connector of Terminal 2 to Female connector of Terminal 1.
- Turn Ignition Switch ON and OBDII scan tool or TOYOTA hand-held tester main switch ON.
- After the engine is warmed up, perform quick racing (4,000 rpm) three times. Check the Diagnostic Trouble Code.
- If Diagnostic Trouble Code now P0330 proceed to step 2.
- If Diagnostic Trouble Code now P0325 proceed to step 3.
2. Check for open and short in harness and connector between EE1 connector and Engine Control Module.
- If OK check and replace Engine Control Module
- If not OK repair or replace harness or connector.
3. Check for open and short in harness and connector between EE1 connector and Knock Sensor.

NOTE: If DTC P0330 has changed to P0325, check the knock sensor circuit on the left bank side.

- If OK replace Knock Sensor
- If not OK repair or replace harness or connector.

INSPECTION USING OSCILLOSCOPE

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With the engine racing (4,000 rpm) measure between terminals KNKH, KNKL of Engine Control Module and body ground. The correct waveform appears as shown in the upper illustration.
Spread the time on the horizontal axis, and confirm that period of the wave is 141 seconds (Normal mode vibration frequency of knock sensor: 7.1 KHz). If normal mode vibration frequency is not 7.1 KHz, the sensor is malfunctioning.

Procedure

PROCEDURE

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1. Remove the Intake Chamber assembly.
2. Disconnect Injector connectors.
Disconnect the heater hose from the Intake Manifold.

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Remove the 9 bolts. 2 nuts, 2 plate washers and Intake Manifold assembly.
3. Remove right hand engine mounting stay and water outlet.

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Disconnect the following hoses and connectors:
- Radiator inlet hose. (1)
- Engine coolant reservoir hose. (2)
- Engine Coolant Temperature Sensor connector. (3)
- Engine Coolant Temperature Switch connector. (4)
- Ground strap connector. (5)

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Remove the 3 bolts and right hand mounting stay.
Remove the wire band.
Disconnect the water bypass hose from the inlet housing.

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Remove the 2 bolts, 2 nuts, 2 plate washers and water outlet.
Remove the 2 gaskets.
4. Remove Knock Sensors.

Okay, got you.

Let us know how you made out. Feel free to ask any follow up questions.

Roy

Okay, if it was running right before you had the service done, then it should still run good after the repair.

Have them recheck the code and see if it is the same or another code. It should not stall at all.

If the fuel is over six months old, you should have it drained and replaced.

Roy