Engine Camshaft Position Sensor for the 2007-2013 Chevrolet Impala
Understand the symptoms of a failing camshaft sensor and choose the right replacement for your Impala's engine.
- Identify your engine first; 2007-2011 models (3.5L/3.9L) have one hard-to-reach sensor, while 2012-2013 models (3.6L) have four sensors with varying difficulty.
- Symptoms like 'Reduced Engine Power' or stalling can also be caused by faulty camshaft actuator solenoids (on 3.6L) or a recalled ignition switch, so proper diagnosis is key.
- For the 3.5L/3.9L engines, check for power steering fluid leaks, as this is a common cause of sensor failure and must be fixed to prevent repeat damage.
- Choosing an OEM/OE brand like ACDelco or Delphi is the most reliable option, with premium aftermarket brands like NGK or Standard Ignition being solid alternatives.
Is Your Impala's Camshaft Position Sensor Failing?
A bad camshaft position sensor can cause noticeable problems that affect your car's drivability. The first and most common sign is the Check Engine Light turning on. You might also experience difficulty starting the engine, where it cranks for a long time before finally turning over, or it may not start at all. Other common symptoms include a rough idle, unexpected stalling, a noticeable loss of power and acceleration, and worse gas mileage than usual. These issues occur because the engine's computer can't properly time the spark and fuel delivery without accurate data from the sensor.
🎬 Watch: 11 common symptoms of a bad camshaft sensor and how to test it.Don't Mistake Other Issues for a Bad Sensor
The 2007-2013 Impala has a few known issues with symptoms that can mimic a failing camshaft sensor:
- Camshaft Actuator Solenoids (2012-2013 3.6L V6): Technical Service Bulletin (TSB) PIP5096C notes that fault codes like P0011, P0014, P0021, and P0024 can be caused by the camshaft actuator solenoids (also called OCVs), not the sensor itself. If you have these codes without other drivability problems, the solenoids may be the actual culprit. 🎬 See this DIY guide for replacing VVT solenoids on the 3.6L engine.
- Power Steering Leaks (3.5L & 3.9L V6): On models with the 3.5L or 3.9L engine, the sensor is located below the power steering pump. It is a common problem for the pump or its hoses to leak fluid directly onto the sensor and its wiring, causing it to fail. If you are replacing the sensor, inspect for and repair any fluid leaks first.
- Ignition Switch Recall: A widespread recall was issued for the ignition switch on 2006-2014 Impalas. A faulty switch can cause the engine to shut off while driving, which can feel like a stall caused by a bad sensor.
Choosing the Right Aftermarket Sensor
When shopping for a replacement, you have several options. Not all aftermarket parts are created equal, but many offer a great balance of quality and value.
- OEM/OE Brands (Top Tier): ACDelco GM Genuine Parts is the original equipment manufacturer and the safest bet for guaranteed fit and performance. Delphi was a GM-owned company and often made the original parts, making them an excellent alternative to ACDelco.
- Premium Aftermarket (Excellent Quality): Brands like NGK (NTK), Standard Ignition (Standard Motor Products), and Hitachi are well-respected in the industry for making high-quality sensors that meet or exceed OEM specifications. These are reliable choices if an OEM part isn't available or is outside your budget.
- Standard Aftermarket (Good Value): Brands such as Dorman, Walker Products, and Holstein offer cost-effective solutions. Dorman is a very popular brand, but owner feedback can be mixed; some parts are excellent while others may have a shorter lifespan. These brands can be a good option, especially for budget-conscious repairs.
| Part Type | Estimated Part Cost | Estimated Labor Cost |
|---|---|---|
| New OEM (ACDelco) | $30 - $65 | $127 - $187 |
| New Aftermarket | $21 - $58 | |
| Used OEM | $15 - $40 |
Engine-Specific Information is Key
The 2007-2011 Impalas primarily used the 3.5L and 3.9L V6 engines, which have a single camshaft position sensor that is difficult to access. The 2012-2013 models use the 3.6L (LFX) V6, which has four camshaft sensors (two intake, two exhaust). The two front sensors on the 3.6L are easy to replace, but the two at the rear of the engine are much more difficult. Be sure to identify which sensor has failed before ordering.
Frequently Asked Questions
How many camshaft position sensors does my 2007-2013 Impala have?
It depends on your engine. Impalas from 2007-2011 with the 3.5L or 3.9L V6 have one sensor. Impalas from 2012-2013 with the 3.6L LFX V6 have four sensors.
Where is the camshaft position sensor located?
On the 3.5L and 3.9L V6 engines, the sensor is on the front of the engine block, below and behind the power steering pump. On the 3.6L V6, there are two on the front of the engine near the passenger side and two in a similar position on the rear of the engine, which are much harder to access.
Can I replace the camshaft position sensor myself?
For the easily accessible front sensors on the 3.6L V6, a DIY replacement is very feasible with basic tools. For the sensor on the 3.5L/3.9L engines and the rear sensors on the 3.6L, the job is more difficult as it requires removing the power steering pump for access. This is a more advanced DIY repair.
Do I need a special tool or a 'relearn' procedure after replacement?
Generally, no special tools are required beyond standard sockets and wrenches. Some sources mention a possible relearn procedure may be needed, but this is not consistently reported for this specific vehicle. In most cases, you can replace the sensor and clear the trouble codes with a standard OBD2 scanner.
🎬 Watch: What to do if your engine runs rough after sensor replacement.Helpful Videos
Technical Specifications
OEM Part Numbers: 12684186 12588992 12595954
The sensor is a Hall-effect type sensor that generates a digital square wave signal for the ECM. It is typically held in place by a single bolt (8mm or 10mm head) and sealed with an O-ring.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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