The Isuzu Code P0851 is a warning that is triggered when the Park/Neutral Position (PNP) Switch Circuit is found to be operating at a low voltage. This code is generated when the ignition voltage is between 8-18 volts, there are no IMS DTCs, the engine speed is over 1,000 RPM, the engine torque is at least 75 N·m (55 lb ft), the throttle position is 8% or higher, and the vehicle speed is at least 10 km/h (6 mph). It is important to understand the causes of this code, as well as the potential solutions, in order to ensure that your Isuzu is running safely and efficiently.
Causes and Solutions for Isuzu Code P0851
| Cause | Solution |
|---|---|
| The ECM detects the Park/Neutral switch signal is 12 volts, high, when the IMS reports a Park/Neutral range for 3 seconds. | Check the Park/Neutral switch, wiring, connections, and the ECM for any damage. |
| A faulty Park/Neutral switch. | Replace the Park/Neutral switch. |
| Faulty wiring or connections. | Check the wiring and connections for any damage or loose connections. |
| A faulty ECM. | Replace the ECM. |
When the Isuzu Code P0851 is triggered, it is important to understand the causes and solutions in order to keep your vehicle running safely and efficiently. The code is typically triggered when the ECM detects the Park/Neutral switch signal is 12 volts, high, when the IMS reports a Park/Neutral range for 3 seconds. Potential causes for this code include a faulty Park/Neutral switch, faulty wiring or connections, and a faulty ECM. Solutions for this code include checking the Park/Neutral switch, wiring, connections, and the ECM for any damage, replacing the Park/Neutral switch, and replacing the ECM. It is important to understand the causes and solutions for this code in order to keep your vehicle running safely and efficiently.
Conclusion
In conclusion, Isuzu Code P0851 is a warning that is triggered when the Park/Neutral Position (PNP) Switch Circuit is found to be operating at a low voltage. It is important to understand the potential causes and solutions for this code in order to ensure that your Isuzu is running safely and efficiently. Potential causes include a faulty Park/Neutral switch, faulty wiring or connections, and a faulty ECM. Solutions for this code include checking the Park/Neutral switch, wiring, connections, and the ECM for any damage, replacing the Park/Neutral switch, and replacing the ECM. By understanding the causes and solutions for Isuzu Code P0851, you can keep your vehicle running safely and efficiently.
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