Workshop Manual

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1141

6E–175

6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS

DTC P0133 – HO2S Slow Response Bank 1 Sensor 1 (Cont'd)

Step NoYesValue(s)Action

14 Visually/physically inspect the following items:

B Ensure that the Bank 1 HO2S 1 is securely

installed.

B Check for corrosion on terminals.

B Check terminal tension (at Bank 1 HO2S 1 and at

the PCM).

B Check for damaged wiring.

Was a problem found in any of the above areas?

— Go to

Step 18

Go to

Step 15

15 1. Disconnect Bank 1 HO2S 1.

2. Ignition “ON”.

3. Using a DVM at the PCM side of the HO2S 1

connector, measure the voltage between the high

signal circuit and ground. Also measure the voltage

between the low signal circuit and ground.

Are both voltages in the specified range?

3-4 V Go to

Step 16

Go to

Step 19

16 1. With Bank 1 HO2S 1 disconnected, jumper the high

and low (PCM side) signal circuits to ground.

2. Ignition “ON”.

3. Using a Tech 2, monitor the Bank 1 HO2S 1 voltage.

Does the Tech 2 indicate less than 10 mV and

immediately return to about 450 mV when the jumper is

removed?

— Go to

Step 21

Go to

Step 22

17 Replace the affected heated oxygen sensors.

NOTE: Before replacing sensors, the cause of the

contamination must be determined and corrected.

B Fuel contamination.

B Use of improper RTV sealant.

B Engine oil/coolant consumption.

Is the action complete?

— Verify repair —

18 Repair condition as necessary.

Is the action complete?

— Verify repair —

19 Check for faulty PCM connections or terminal damage.

Is the action complete?

— Verify repair Go to

Step 20

20 Repair open, short or grounded signal circuit.

Is the action complete?

— Verify repair —

21 Replace Bank 1 HO2S 1.

Is the action complete?

— Verify repair —

22 Replace the PCM.

IMPORTANT: The replacement PCM must be

programmed. Refer to

On-Vehicle Service

Powertrain Control Module and Sensors

for

procedures.

And also refer to latest Service Bulletin.

Check to see if the Latest software is released or not.

And then Down Load the LATEST PROGRAMMED

SOFTWARE to the replacement PCM.

Is the action complete?

— Verify repair —