Q: Engine tick and check engine light.

asked by on October 11, 2016

My 2011 GMC Sierra 1500 has the check engine light on. A few days before the light came on, I noticed my engine had a tick which sounded like a lifter, but didn't seem loud enough to be a lifter. So I called OnStar yesterday and they said my truck was experiencing problems with the fuel system and that the code was PQ19A, the light remains on and I have to commute a long ways to and from college. Could it be my injector going out? It is a tick not a knock

My car has 118200 miles.
My car has an automatic transmission.

Hello, thanks for writing in. It is possible that you have a fuel injection issue, but that is not that common on this vehicle. Most of the time when this occurs with a ticking noise also it is due to a problem with the valve train. The variable valve timing on this vehicle tends to have issues causing the timing valve body to fail. In some cases this can be as simple as the wrong oil being used or a dirty oil filter so I always change the oil first. If that does not help then further diagnostics will need to be done to determine if there is an internal issue with the valve timing control system. If you are planning on having this ticking noise and engine code checked, consider YourMechanic, as a certified mechanic can come to your home or office to diagnose and repair this.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Brakes not pumping up.

The best thing to do with a new master cylinder is to bench bleed it. Here's how: You use a vice to grab the nubs of the master cylinder and mount it up about waist high. If you don't...

Replaced my engine. Does the new one need to be adjusted to the higher elevation?

Check all of the sensors and make sure that they are plugged in all the way. The computer system with the sensors are designed to adjust themselves as elevation changes. This is why all vehicles today have computers in them...

What causes a DTC P0010 to come up and how easy/difficult is it to repair?

The code P0010 is for a problem with the intake camshaft sensor. The camshaft sensor is common to have to be replaced to fix the no start condition. The sensor is on the front of the engine on front timing...

Related articles

Symptoms of a Bad or Failing Crankcase Vent Filter
Common signs include oil leaks, excessively high idle, and a decrease in engine performance, power, and acceleration.
A Buyer's Guide to the 2012 GMC Yukon XL
When When you want a huge vehicle with plenty of luxury inside, you’re probably going to be happiest with the 2012 GMC Yukon XL. Key Features The 5.3-liter V8 engine on this full-size SUV isn’t surprising, but its fuel economy...
How to Understand Compression and Power Systems in Small Engines
Being familiar with basic compression and power system functions of a four-stroke engine can help you diagnose and fix issues with your car.