The RAM Code P2273 is a common issue that can cause problems with O2 Sensor 2/2 Signal Biased Rich. This code is triggered when an aged Upstream O2 Sensor has a slower response rate than when it was new, moving less with the same air/fuel changes in a given time frame. This can result in an inaccurate reading of the downstream O2 sensor, which is monitored for proper response to ensure optimum catalytic converter efficiency. It is important to identify the cause of the issue so an appropriate solution can be implemented. The causes of the RAM Code P2273 can include OXYGEN SENSOR WIRING OR CONNECTORS, O2 SENSOR 2/2 SIGNAL CIRCUIT, O2 SENSOR 2/2 RETURN CIRCUIT, O2 SENSOR 2/2, or the POWERTRAIN CONTROL MODULE (PCM).
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Causes and Solutions to RAM Code P2273
| Cause | Solution |
|---|---|
| OXYGEN SENSOR WIRING OR CONNECTORS | Check the wiring and connectors for any damage and replace if necessary. |
| O2 SENSOR 2/2 SIGNAL CIRCUIT | Test the O2 Sensor 2/2 signal circuit for any shorts or breaks in the wiring. |
| O2 SENSOR 2/2 RETURN CIRCUIT | Check the O2 Sensor 2/2 return circuit for any damaged wiring. |
| O2 SENSOR 2/2 | Replace the O2 Sensor 2/2 if the wiring and circuits are not the issue. |
| POWERTRAIN CONTROL MODULE (PCM) | Replace the PCM if all other causes have been ruled out. |
OXYGEN SENSOR WIRING OR CONNECTORS
The issue of RAM Code P2273 can be caused by faulty oxygen sensor wiring or connectors. Before any other steps are taken, it is important to inspect and check the wiring and connectors for any damage or corrosion. If any damage is found, the wiring and connectors must be replaced.
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O2 SENSOR 2/2 SIGNAL CIRCUIT
The O2 Sensor 2/2 signal circuit can also be a possible cause of RAM Code P2273. This is the circuit that the oxygen sensor uses to communicate with the PCM. If any shorts or breaks in the wiring are present, it can cause the code to be triggered. It is important to diagnose and test the circuit for any issues.
O2 SENSOR 2/2 RETURN CIRCUIT
The O2 Sensor 2/2 return circuit is the circuit that provides power to the oxygen sensor. If there is any damaged wiring in the circuit, it can cause the code to be triggered. It is important to inspect and diagnose the circuit for any issues.
O2 SENSOR 2/2
The O2 Sensor 2/2 can also be a possible cause of RAM Code P2273. If the wiring and circuits are not the issue, then the oxygen sensor is likely faulty. In this case, the O2 Sensor 2/2 must be replaced.
POWERTRAIN CONTROL MODULE (PCM)
The last possible cause of RAM Code P2273 is a faulty PCM. If all other causes have been ruled out, then it is likely that the PCM is defective and must be replaced.
Conclusion
The RAM Code P2273 can be caused by some issues, including OXYGEN SENSOR WIRING OR CONNECTORS, O2 SENSOR 2/2 SIGNAL CIRCUIT, O2 SENSOR 2/2 RETURN CIRCUIT, O2 SENSOR 2/2, or the POWERTRAIN CONTROL MODULE (PCM). It is important to correctly identify the cause of the issue to resolve the RAM Code P2273 properly. Following the solutions listed in the table ensures that the problem is accurately diagnosed and the appropriate solution is implemented.
💥See also: RAM Code U1409
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