OBD-II Code · Powertrain
P0015
"B" Camshaft Position - Timing Over-Retarded (Bank 1)
Severity
medium
Worth booking. It costs fuel, emissions or comfort until it is fixed.
Can you drive it
Only if running normally
A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety.
Indicative cost (USD)
$150–$1,200
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Exhaust cam on bank 1 is more retarded than commanded.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
- Power loss
- Emissions failure risk
Likely causes
- Stuck exhaust phaserMost common
- Sludged oil
- Failed OCV
- Worn timing components
Read the full diagnostic procedureBank 1 EXHAUST camshaft is mechanically OVER-RETARDED — exhaust cam won't advance off park, or falls back to retard under command.
Bank 1 EXHAUST camshaft is mechanically OVER-RETARDED — exhaust cam won't advance off park, or falls back to retard under command.
Cheapest-first ladder
- Live-data commanded vs actual exhaust cam angle at 2500 rpm warm — if commanded climbs to 15-25 degrees advance but actual stays near 0, the OCV isn't routing oil or the phaser is stuck.
- Swap the exhaust OCV with a known-good unit and recheck — quickest way to isolate solenoid vs phaser.
- Clean the OCV screen.
- Verify hot oil pressure — minimum 10 psi idle. Don't replace the exhaust cam phaser before testing the OCV — exhaust OCVs fail more often than exhaust phasers do, and they're a 30-minute, $80 fix versus a 5-hour, $1,200 fix.
Vehicle-specific patterns2007-2016 Toyota Camry/Sienna/Highlander 2GR-FE — exhaust OCV failure is the #1 cause, updated part 15330-31040 with finer screen.
- 2007-2016Toyota Camry/Sienna/Highlander 2GR-FE — exhaust OCV failure is the #1 cause, updated part 15330-31040 with finer screen.
- 2010-2014Hyundai Sonata/Optima 2.4L Theta II GDI — exhaust OCV failure combined with timing chain stretch, often pairs P0015 with P0016.
- 2011-2016Ford F-150 5.0L Coyote — exhaust phaser failure mode is stuck-retarded on bank 1, replace phaser pair.
- 2008-2015Mitsubishi Lancer/Outlander 2.4L 4B12 — known OCV connector corrosion, repin or replace harness pigtail.
Estimated repair$60 to $1,600.
Look up another code
P0015 — frequently asked
What does a P0015 code mean?
Exhaust cam on bank 1 is more retarded than commanded.
What causes a P0015 code?
Common causes: Stuck exhaust phaser; Sludged oil; Failed OCV; Worn timing components.
What are the symptoms of a P0015 code?
Typical symptoms: Check engine light; Power loss; Emissions failure risk.
Is it safe to drive with a P0015 code?
Only if running normally. A short trip to a shop may be reasonable if the light is steady and the car runs normally. Stop safely for a flashing light, severe shaking, overheating, loss of power, or another urgent warning. The code alone cannot confirm safety. Estimated repair: $150-$1,200.
How do I diagnose a P0015 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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