5.32
Section 5
EFI Fuel System
2. TPS Learn Procedure Incorrect
a. Lean condition (check oxygen sensor signal
with VOA and see Oxygen Sensor section).
3. Engine wiring harness related such as a cut wire,
broken or pinched.
Code: 0132
Component: Oxygen Sensor
Fault: O2S 1 Circuit High Voltage
Condition: Shorted connection or faulty sensor.
Possible Causes:
1. Oxygen Sensor Related
a. Sensor connector or wiring problem.
b. Sensor contaminated or damaged.
c. Poor ground path.
d. Pin circuit wiring or connectors.
ECU Black pin 10 or Black pin 17.
2. Engine Wiring Harness Related
a. Diff erence in voltage between sensed voltage
and actual sensor voltage.
b. Short in wire harness.
Code: 0171
Component: Fuel System
Fault: Maximum adaptation limit
exceeded
Condition: Fuel inlet screen/fi lter plugged, low
pressure at high pressure fuel line, TPS malfunction,
shorted connection, faulty sensor, low fuel or wrong
fuel type.
Possible Causes:
1. Oxygen Sensor Related
a. Corrosion or poor connection.
b. Sensor contaminated or damaged.
c. Air leak into exhaust.
d. Poor ground path.
e. Pin circuit wiring or connectors.
1. ECU Black pin 10 or Black pin 17.
2. TPS Sensor Related
a. Thro le plate position incorrect during Learn
procedure.
b. TPS problem or malfunction.
3. Engine Wiring Harness Related
a. Diff erence in voltage between sensed voltage
and actual sensor voltage.
b. Problem in wiring harness.
c. ECU-to-harness connection problem.
4. Systems Related
a. Ignition (spark plug, plug wire, ignition coil).
b. Fuel (fuel type/quality, injector, fuel pressure
too low, fuel pump module or li pump).
c. Combustion air (air cleaner dirty/restricted,
intake leak, thro le bores).
d. Base engine problem (rings, valves).
e. Exhaust system leak (muffl er, fl ange, oxygen
sensor mounting boss, etc.).
f. Fuel in the crankcase oil.
Code: 0172
Component: Fuel System
Fault: Minimum adaptation limit exceeded
Condition: Too high pressure at high pressure fuel
line, TPS malfunction, shorted connection, faulty
sensor or fuel pump module failure.
Possible Causes:
1. Oxygen Sensor Related
a. Sensor connector or wiring.
b. Sensor contaminated or damaged.
c. Poor ground path.
d. Pin circuit wiring or connectors.
ECU Black pin 10 or 17.
2. TPS Sensor Related
a. Thro le plate position incorrect during Learn
procedure.
b. TPS problem or malfunction.
3. Engine Wiring Harness Related
a. Diff erence in voltage between sensed voltage
and actual sensor voltage.
b. Problem in wiring harness.
c. ECU-to-harness connection problem.
4. Systems Related
a. Ignition (spark plug, plug wire, ignition coil).
b. Fuel (fuel type/quality, injector, fuel pressure
too high, fuel pump module or li pump).
c. Combustion air (air cleaner dirty/restricted).
d. Base engine problem (rings, valves).
e. Fuel in the crankcase oil.
f. Fuel pump module is over fi lled.
g. Li pump diaphragm is ruptured.
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