Q: Knock sensor P0332 2004 Chevrolet Express 2500

asked by on March 18, 2017

Hello I have a 04 chevy cargo van 4.8L. Van has engine code p0332 . I have changed out both knock sensors , and also the harness. Cleared the codes and a couple days later comes back. Changed plugs wires and coils . Light still on . About every two months the light goes off for a day or so then comes back . Any ideas will be greatly appreciated. Thank you in advance!

My car has 221000 miles.
My car has an automatic transmission.

Electrical components are not working Inspection $79.99 - $99.99 Get a Quote

Hi there - the P0332 problem code indicates a "low signal", which can mean a bad knock sensor, but it can also mean "no signal", as in, a wiring problem. Check the connections to the sensor for good connectivity, and look for chafed or broken wires on the engine wiring harness (not easy on an Express van!). If no obvious fault is found, it will be time to start checking the signal at the ECU and working backwards to the sensor. I recommend a electrical component failure performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, and give you an accurate assessment of damage and cost estimate for repairs.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

My 2004 acura tsx center control panel lights are off or really dim.

This happens on many cars with some age. Unfortunately the only way to resolve this issue is to replace the entire control unit in the center console. This is because the lights that light up this part of the dash...

I have a 2010 Mercedes Benz E350. I had it checked for an oil leak and theyre saying that I need over 6k worth of repairs (includi

Repairs for over $6000 on this vehicle is common on a vehicle that is this age and would be a decision foe you to decide if you want to spend the $6000 to repair this one or trade it in...

How much will it cost to replace and install a brand new front bumper for a 2003 Honda Accord ? I haven't gotten any parts yet

Hi there. Unfortunately, replacing a front bumper is not a service our professional mobile mechanics offer; so it's hard to provide you an estimate for this service. You might want to contact a local body repair shop to receive an...

Have to jump start it everytime i want to use i, has slowly been getting worse. i have had the battery checked.

If after the battery is jump started and the charging system light is not on then you should not only have the battery full charged and then load tested to see if it can take a load for 15 seconds...

My car won't start

This may be related to many different possibilities, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...

Car won't start - 2004 Mercedes Benz C240

This maybe caused by a variety of potential issues. For starters, I would suggest testing the key a few times while moving the steering wheel to see if this will get it to start again. Try another key, too, if...

Trying to determine if a Honda 2005 vtec (D172A) sohc, 127 hp has an O2 upstream sensor problem or the ECU

Hello. From what you describe it would appear that your upstream oxygen sensors are causing the issue. If you disconnect them and the vehicle runs better then it may very well be possible that the signal they are sending or...

Malfunctioning driver's side power seat.

The power seat switch may be bad and would have to be checked for sending power out to the power tilt and recline functions. If the switch is working correctly then the power seat motors would be checked and replaced...

New battery, but car still doesn't start

While having a good battery is a great way to make sure your car is starting great, it is only one of many components that assist in getting your car running. If you have verified that you have a good...

Related articles

The Best Used Cars to Buy If Your Kid's On the Soccer Team
If If you are a soccer mom (or dad), you know that you need a lot of space to transport your budding World Cup contenders, along with their gear. From time to time, you can also expect to be bringing...
2005 Jeep Wrangler vs. 2005 Chevrolet Blazer: Which One Should I Buy?
Sport SUVs are a class all of their own; these vehicles are meant for a fun drive through the woods and across the trail – but not necessarily to Grandma’s house! Think instead about going through the creek and through...
The Best Used Cars to Buy If You Don’t Have Kids
Buying Buying a used car is rarely a simple process, but if you don’t have kids, you have many more options than those who have to account for additional passengers. There are plenty of choices out there, depending on your...