Dodge ZB 2005 Service Manual page 1201

DRIVEABILITY - GAS
P0172-1/1 FUEL SYSTEM RICH —
TEST
13 Ignition on, engine not running.
Leave the O2 Sensor and PCM harness connectors disconnected.
Measure the voltage on the O2 Sensor Signal circuit at the O2 Sensor harness
connector.
Is the voltage above 5.2 volts?
Yes → Repair the short to voltage in the O2 Sensor Signal circuit.
→ Go To 14
No
NOTE: Turn the ignition off before continuing.
14 NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay
particular attention to all Power and Ground circuits.
If there are no possible causes remaining, view repair.
Repair
Continued
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 5.
Replace and program the Powertrain Control Module per Service
Information.
Perform POWERTRAIN VERIFICATION TEST VER - 5.
80
APPLICABILITY
All
All