P081D OBD-II: Neutral Input Circuit
P081D Severity
Should you fix P081D yourself?
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
What causes OBD-II fault code P081D?
The engine computer (PCM) verifies that the transmission is in Park/Neutral before allowing the vehicle to crank. If the Transmission Control Module does not tell the PCM it is okay to crank the vehicle, code P081D will be set.
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OBD II Fault Code
- OBD II P081D
OBD-II Code Engine may not start is defined as a Neutral Input Circuit
The engine computer (PCM) verifies that the transmission is in Park/Neutral before allowing the vehicle to crank. If the Transmission Control Module does not tell the PCM it is okay to crank the vehicle, code P081D will be set.
Engine may not start Symptoms
- Engine may not start
Common Problems That Trigger the P081D Code
- Neutral safety switch failure
- Powertrain Control Module (PCM) failure
- Transmission Control Module (TCM) failure
- Wiring issue
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