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Engine Position (Camshaft) Sensor Circuit
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Overview
| CODE | REASON | EFFECT |
| Fault Code: 753 or 778 PID: S064 SPN: 723 FMI: 2 LAMP: Yellow SRT: |
No engine speed signal detected at the electronic control module (ECM) from the backup engine speed engine position (camshaft) sensor. |
Possible poor starting capability. |
 Engine Position (Camshaft) Sensor Circuit
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Circuit Description
The engine position (camshaft) sensor provides engine position information to the electronic control module (ECM). The sensor generates the signal by sensing the movement of target teeth machined in the camshaft gear.
Component Location
Use the engine diagrams in Section E of this manual for the component location.
Shop Talk
Possible causes of this fault code include damaged engine position (camshaft) sensor, debris on tip of sensor, open or short circuit, or power supply voltage failure.
Fault Code 753: When checking the sensor air gap, inspect each cam gear notch for debris or failed cam gear. The ECM will trigger Fault Code 753 if it does not see the proper amount of pulses; four-cylinder engines have five notches on the cam gear and six-cylinder engines have seven notches.
Refer to Troubleshooting Fault Code t05-778
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