DTC Advanced Diagnostics: P134B (2.0L Engine) (2024 2025)
DTC P134B : Crankshaft Signal Diagnose
General Description
The powertrain control module (PCM) checks for crankshaft signal loss and crankshaft signal disturbances. It also performs a rationality check of the crankshaft position (CKP) sensor signal. If the following failures are detected, the PCM stores a DTC:
- Pulse length of CKP sensor signal is out of tolerance
- Engine stop position calculated from the CKP sensor signal deviates too much from the real engine position
- Implausible reverse pulses detected since the PCM was switched on is too high
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 0.5 seconds or more |
| DTC Type | Two drive cycles, MIL off |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Engine speed [Engine Speed] | 1, 000 rpm | - |
[ ]: HDS Parameter
Malfunction Threshold
- Check of signal pulse length
Implausible pulse length of the CKP sensor signal is detected at least 10 times.
- Check of engine stop position
The engine stop position calculated from the CKP sensor signal deviates too much from the real engine position at least 10 times.
- Check of implausible reverse rotation
Implausible reverse pulses are detected at least 10 times since the PCM was switched on.
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.
- CKP sensor loose connection or poor contact
- Noise disturbance by starter
- Noise disturbance during stop phase
- Pulse plate defection
- CKP sensor failure
- PCM internal circuit failure
Confirmation Procedure
Operating Condition
Start the engine, and drive the vehicle at engine speed [Engine Speed] 1, 000 rpm or more.
- Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.
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, a Confirmed DTC, the freeze data, and the on-board snapshot are stored. The MIL does not come on.
Conditions for clearing the DTC
The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.