Workshop Manual

6E–193
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0141 – HO2S Heater Circuit Bank 1 Sensor 2 (Cont'd)
Step NoYesValue(s)Action
6 1. Allow the HO2S to cool for at least 15 minutes.
2. Using a DVM, measure the resistance between the
Bank 1 HO2S 2 ignition feed and the Bank 1 HO2S 2
heater ground at the Bank 1 HO2S 2 pigtail.
Is the HO2S resistance within the specified values?
3-6 ohms Go to Step 9 Go to Step 10
7 Repair the open Bank 1 HO2S 2 ignition feed circuit to
Bank 1 HO2S 2.
Is the action complete?
— Verify repair —
8 Repair the open Bank 1 HO2S 2 heater ground circuit.
Is the action complete?
— Verify repair —
9 1. Check for a poor connection at the Bank 1 HO2S 2
harness terminals.
2. If a poor connection is found, replace the terminals.
Was a poor connection found?
— Verify repair Go to Step 10
10 1. Ignition “OFF”.
2. Disconnect the PCM and check the continuity of the
Bank 1 HO2S 2 signal circuit and the Bank 1 HO2S
2 low circuit.
3. If the Bank 1 HO2S 2 signal circuit or the HO2S low
circuit measures over 5 ohms, repair the open or
poor connection as necessary.
Was a problem found?
— Verify repair Go to Step 11
11 1. Ignition “OFF”.
2. Disconnect the PCM and check the continuity of the
Bank 1 HO2S 1 signal circuit and the Bank 1 HO2S
1 low circuit.
3. If the Bank 1 HO2S 1 high circuit or the HO2S low
circuit measures over 5 ohms, repair the open or
poor connection as necessary.
Was a problem found?
— Verify repair Go to Step 12
12 Check for a poor Bank 1 HO2S 2 low circuit terminal
connection at the PCM and replace the terminal if
necessary.
Did the terminal require replacement?
— Verify repair Go to Step 13
13 Check for a poor Bank 1 HO2S 2 high circuit terminal
connection at the PCM and replace the terminal if
necessary.
Did the terminal require replacement?
— Verify repair Go to Step 14
14 Replace Bank 1 HO2S 2.
Is the action complete?
— Verify repair —
15 Locate and repair the short to ground in Bank 1 HO2S 2
ignition feed circuit and replace the faulty fuse.
Is the action complete?
— Verify repair —