Code 13, Open Oxygen Sensor Circuit
NOTE:
Test numbers refer to test numbers on diagnostic chart.
- This tests if problem still exists. Code 13 indicates an open in the O2 sensor circuit under the following conditions:
- Coolant temperature at least 108°F (42°C).
- Neither Code 21 nor Code 22 are stored.
- O2 sensor voltage is within a specified range (.34-.55 volt).
- Throttle angle is greater than 6 percent (off-idle).
- More than 40 seconds have elapsed since start-up.
- All conditions have existed for at least 20 seconds.
- Determines if O2 sensor, wiring or ECM is at fault.
- This tests O2 sensor circuit wiring. Use only a high impedance (10-megohm minimum) digital voltmeter.