DTC P0727: Engine Speed Input Circuit No Signal
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P0727 - ENGINE SPEED INPUT CIRCUIT NO SIGNAL
| Description: | The TCM continuously monitors the clean tachometer output (CTO) circuit from the PCM for an engine speed signal. This DTC is set when if there is a CTO circuit fault. | ||
| Possible Causes: |
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| Diagnostic Aids: | The TCM PID ENGCTO should correspond to actual engine speed. If the PID displays 0 RPM when the engine is running, it indicates a CTO circuit fault. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | - | GO to Pinpoint Test QE . |