DTC Advanced Diagnostics: P08AF, P08B0 (1.5L Engine) (2025)
DTC P08AF : Neutral Position Sensor B Circuit Low Voltage DTC P08B0 : Neutral Position Sensor B Circuit High Voltage
General Description
Table A: Neutral position sensor output voltage
| NSS1 voltage | NSS2 voltage | |
|---|---|---|
| Neutral | 2.7 - 3.0 V | 1.35 - 1.5 V |
Neutral position sensor A and neutral position sensor B are semiconductor type that output different voltage characteristics. Each neutral position sensor outputs a voltage which depends on the condition is shown in Table A. The powertrain control module (PCM) judges whether it is in neutral or not from the neutral position sensor output voltage, and uses the information for various controls and auto idle stop system control (if equipped). Neutral position sensor A is for judging the neutral, and neutral position sensor B compares their output voltage to each other for malfunction detection. When the neutral position sensor B output voltage is a specified voltage for a set time, the PCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 2.0 seconds or more |
| DTC Type | Two drive cycle, MIL on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery] | 10.0 V | - |
| Vehicle | ON mode | |
[ ]: HDS Parameter
Malfunction Threshold
DTC: P08AF
The neutral position sensor B output voltage is 0.15 V or less for at least 2.0 seconds.
DTC: P08B0
The neutral position sensor B output voltage is 3.5 V or more for at least 2.0 seconds.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
DTC: P08AF
- Neutral position sensor B VCC1 line open
- Neutral position sensor B NSS2 line short to ground
DTC: P08B0
- Neutral position sensor B SG1 line open
- Neutral position sensor B NSS2 line short to power
Common
- Neutral position sensor B failure
- PCM internal circuit failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected during the first drive cycle, a Pending DTC is stored in the PCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC, the freeze data, and the on-board snapshot are stored.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.