P2615 critical

Camshaft Position Signal Output Circuit Low

The P2615 code means the vehicle's onboard diagnostic system has detected: Camshaft Position Signal Output Circuit Low. This is a critical severity code.

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Keep driving?: No -- stop driving
DIY difficulty: hard
Estimated cost: $100 - $800 (parts and labor)

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Common Symptoms

Engine cranks but will not start
Random misfires if engine does run
Timing-related codes in other modules
Check engine light on

Probable Causes (Ranked by Likelihood)

Short to ground in cam signal output wiring Very High
ECM cam output driver shorted High
Receiving module pulling signal low Moderate
Water intrusion in signal circuit connector Low

Step-by-Step Diagnostic Procedure

Check cam signal output circuit for short to ground
Disconnect receiving modules one at a time to isolate fault
Test ECM cam output voltage
Inspect connectors for moisture damage

Frequently Asked Questions

Can a module connected to the cam signal cause P2615?

Yes. If another module on the circuit has an internal short, it can pull the signal low. Disconnecting modules one at a time can isolate the faulty one.

Is P2615 always an ECM problem?

Not always. While the output circuit originates at the ECM, wiring shorts and downstream module faults are more common than ECM internal failure.

How does the cam signal affect fuel injection?

The cam signal tells the ECM which cylinder is on its compression stroke, allowing sequential fuel injection. Without it, the ECM cannot fire injectors correctly.