Code P0009: Engine Position System Performance, Bank 2
The fault code P0009 is a generic powertrain code (OBD-II) that indicates a timing problem between the camshafts of engine bank 2 and the crankshaft. This guide explains its causes, symptoms, and repair solutions.
What is Code P0009?
The Engine Control Module (ECM) continuously monitors the alignment of the camshafts relative to the crankshaft. Code P0009 is triggered when the ECM detects a persistent and significant misalignment on bank 2 of the engine (the side that does not contain cylinder #1), exceeding the manufacturer’s specified tolerances.
This fault is common on certain engines from brands like General Motors (GM, Cadillac, Buick, Holden) and Suzuki, for which technical service bulletins often exist. It rarely appears alone and is usually accompanied by other timing-related codes, such as P0008, P0016, P0017, P0018, or P0019.
Symptoms of Fault P0009
When this code is stored, you may observe one or more of the following symptoms:
- 🔴 Illumination of the check engine light (MIL) on the dashboard
- ⚡ Loss of power and hesitant acceleration
- ⛽ Increased fuel consumption
- 🔊 Rattling or knocking noise coming from the timing cover
- 🚗 Engine running rough at idle
Possible Causes of Code P0009
The misalignment causing code P0009 typically stems from one of these issues:
- Stretched or worn timing chain (most common cause on GM engines)
- Faulty chain tensioner or worn guide
- Misaligned crankshaft reluctor wheel
- Problem with the drive sprockets or phasers
- Poor quality engine oil or insufficient oil level
How to Diagnose and Repair Code P0009?
Warning: If your vehicle is still under powertrain warranty, take it immediately to an authorized dealer.
For other cases, here is the recommended procedure:
- Start with a complete fault code scan to identify all present DTCs.
- Inspect the engine oil level and quality. Perform an oil change if necessary.
- Using an advanced diagnostic tool, observe the real-time data from the camshaft position (CMP) and crankshaft position (CKP) sensors.
- Visually inspect the timing cover to check the chain tension, and the condition of the tensioner and guides.
- Check the alignment of the timing marks.
- On affected GM engines (such as the 3.6L LY7/LLT or 2.8L LP1), the official fix often involves replacing the complete timing kit (chains, tensioners, guides).
⚠️ Important Tip: Always consult a repair manual specific to your make and model for exact timing procedures and torque values. This repair is complex and requires mechanical expertise.
Call to Action
Code P0009 indicates a serious mechanical problem that should not be ignored. An overly stretched timing chain can jump and cause catastrophic engine damage.
Suspect a timing problem? Don’t take risks. Have your vehicle diagnosed by a professional today to get an accurate quote and avoid a costly breakdown.