Camshaft Position Signal Output Circuit High
The P2616 code means the vehicle's onboard diagnostic system has detected: Camshaft Position Signal Output Circuit High. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- hard
- Estimated cost
- $100 - $800 (parts and labor)
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What Are the Symptoms of P2616?
- Engine misfires and rough running
- Timing out of synchronization
- Other modules reporting cam signal errors
- Check engine light on
What Causes P2616? (Most Likely First)
- Short to voltage in cam signal output wiring Very High
- ECM output driver stuck high High
- Wiring crossed with another signal circuit Moderate
- Electromagnetic interference affecting signal Low
Can I Still Drive with P2616?
No — stop driving. P2616 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
What happens when the cam signal is stuck high?
Receiving modules see a constant signal instead of a pulsing waveform, making it impossible to determine camshaft position. Fuel injection timing is lost.
Can aftermarket electronics cause P2616?
Yes. Improperly shielded aftermarket electronics can introduce electrical noise or voltage into the cam signal circuit.
Do I need an oscilloscope to diagnose P2616?
An oscilloscope provides the best view of the cam signal waveform, but a scan tool monitoring cam signal data and a multimeter checking for shorts can also be effective.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P2616?
-
Check cam signal output circuit for short to power
-
Verify ECM cam output with oscilloscope
-
Inspect wiring for contact with adjacent circuits
-
Check for aftermarket electronics causing interference
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P2616?
- 2010-2020 Toyota Highlander
- 2012-2019 Honda CR-V
- 2008-2018 Ford Explorer
- 2011-2020 Chevrolet Traverse
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