Heated Oxygen Sensor Control Circuit (Bank 1 Sensor 2)
symptoms
Other than the MIL light illuminating you may not notice any performance issues.
cause
A short in the O2 sensor heater circuit or the sensor itself
A faulty O2 sensor heater
Wiring or connectors are broken or frayed to the sensor or relay
Bad PCM or ECM
The fix
Correct wiring short or loose connector found in inspection.
and/or
Replace the bank 1 sensor 2, O2 sensor
Replace PCM if circuit has failed and no wiring issues present, good O2 sensor
What causes ticking, check engine light, and the check gauges sensor to come on in a 1999 Dodge Durango 5.2L SUV?
no for sure not
P1491 Rad Fan Control Relay Circuit
Yes both the 5.2 and 5.9 will fit the motor mounts are the same for both engines. Check to make sure the 2000 had one of the 2 motors to be sure. Check the vin#.
check your answer
That is the check engine light. The engine computer has detected a malfunction and set a trouble code.
Large emission vapor leak. Check the gas cap and all lines from the tank to the engine.
With a scan tool
With a scan tool,
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
The two main symptons would be a check engine light and an oil leak.
Check engine light, low power, poor fuel economy, etc.