Daewoo CIELO EURO III Manual page 367

Step
1. Remove and visually/physically inspect the
Oxygen Sensor (O2S 1) for silicone
contamination. This will be indicated by a
powdery white deposit on the portion of the O2S
1 sensor exposed to the exhaust stream.
18
2. If contamination is present on the O2S 1 sensor,
find the source of the contamination and repair
and also replace the contaminated O2S 1 sensor.
Is the problem found and corrected?
1. Check the TP sensor mounting screws
2. If they are loose or missing tighten or replace
them as necessary.
19
3. If the screws are OK, replace the TP sensor.
Is the action complete?
1. Turn the ignition switch OFF.
20 2. Replace the MAP sensor.
Is the action complete?
1. Using the scan tool, clear the DTCs.
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the conditions for
21
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?
Check if any additional DTCs are set.
22
Are any DTCs displayed that have not been diag-
nosed?
DAEWOO T-154 BL2,3
DTC P0172 Fuel Trim System Too Rich (Cont'd)
Action
ENGINE CONTROLS 1F – 198
Value Yes
–
Go to Step 21
–
Go to Step 21
–
Go to Step 21
–
Go to Step 22
– Go to applicable
DTC table
No
Go to "Diag-
nostic Aids"
–
–
Go to Step 2
System OK