Knock Sensor + Wiring Harness installation cost? Will YourMechanic install parts if I provide them?
Hi there, I currently have a check engine light on and pulled the codes. The code reads as a faulty knock sensor. I'm very familiar with my car, and did a vast amount of research. Sometimes, its just a faulty knock sensor wiring harness that gets defective due to the heat. So my question is, If I can provide my own knock sensor and perhaps a wiring harness, can a mechanic just install this for me? I would like to use a OEM knock sensor, due to negative reviews on aftermarket. And if so, do you guys have a knock sensor wiring harness in stock?
I have used yourmechanic once already, and ha
Experienced mechanics share their insights in answering this question :
Hello. Yes we will install parts that are provided by you but doing so will void our warranty. You will also be charged for the technicians time if the part you provide does not fit properly. After we install the parts if the condition returns we will come back out and inspect the vehicle. If the issue is not related to the service we performed you will be charged an inspection fee but if it is related we would turn that over to our warranty claims department. The harness is something that our parts department can obtain for you when you’re ready to schedule your next appointment. I will ask our customer service department to send you a quote for the knock sensor installation and they should be able to get a price for that harness too. Thank you for choosing YourMechanic!
How to Identify and Fix Common car Problems ?
Our sources include academic articles, blog posts, and personal essays from experienced mechanics :
The Average Cost for a Knock Sensor Replacement Is $20 to $400, Depending on Whether You Go to a Mechanic or DIY. This price range is based on the national averages for all vehicles that get this procedure, and it doesn`t include fees, taxes, your location, or your vehicle`s make and model.
An essential replacement item for restoring proper engine functioning, our Ignition Knock (Detonation) Sensor Connector effectively relays electrical signals to the electronic control unit.
The 2 wire knock sensors utilise the second wire as a shield and a signal ground reference.
Make sure that your vehicle can detect engine knock by replacing your knock sensor wiring harness as soon as it fails. Prevent costly engine repairs by installing a high-quality wiring harness from CarParts.com.
The average cost for a Knock Sensor Replacement is between $305 and $390. Labor costs are estimated between $192 and $242 while parts are priced between $113 and $148.
A knocking sound coming from your car`s engine can indicate an issue with the crankshaft journal and bearing, which are hitting each other. It`s not exactly a simple fix, so auto shops tend to charge anywhere from $2,000 to $3,000. Some repairs can run up to $4,000 if the damage is severe.
Bad Engine Performance
A malfunctioning engine knock sensor can cause the PCM to wrongly adjust the ignition timing, resulting in inadequate engine performance. The engine may not feel right while driving at high speed or when the vehicle is carrying a weighted load.
No. A knock sensor exists to educate the engine controller (ECM) that detonation is occurring and to relax the ignition timing. The detonation (unless it is parts that are worn out in the engine slapping around) is from multiple flame fronts colliding in the cylinders.
The V6 has two knock sensors; one for each bank of three cylinders. Number 1 knock sensor is at the front of the engine, number 2 at the back.
The RTD wire is a pure material, typically platinum, nickel, or copper. The material has an accurate resistance/temperature relationship which is used to provide an indication of temperature. As RTD elements are fragile, they are often housed in protective probes.
When knock occurs, the sensor will produce about spikes from 0 – 4.5 volts (depending on severity of knock). You can lightly tap the area surrounding the sensor to manually test it.
If the wiring harness in question is located in a tough-to-reach area, the technician may need to disassemble parts of the vehicle to gain access. In other words, installing a wiring harness could take as little as an hour, as long as 20 hours, or longer if complications arise.
A malfunctioning engine knock sensor can cause the PCM to wrongly adjust the ignition timing, resulting in inadequate engine performance. The engine may not feel right while driving at high speed or when the vehicle is carrying a weighted load.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Knock Sensor + Wiring Harness installation cost? Will YourMechanic install parts if I provide them?
ANSWER : Hello. Yes we will install parts that are provided by you but doing so will void our warranty. You will also be charged for the technicians time if the part you provide does not fit properly. After we install the parts if the condition returns we will come back out and inspect the vehicle. If the issue is not related to the service we performed you will be charged an inspection fee but if it is related we would turn that over to our warranty claims department. The harness is something that our parts department can obtain for you when you’re ready to schedule your next appointment. I will ask our customer service department to send you a quote for the knock sensor installation and they should be able to get a price for that harness too. Thank you for choosing YourMechanic!
I have a 2016 kia forte. A rodent ruined my wiring harnesses causing safety and operational issues. Kia says the harnesses have to
ANSWER : Hi there. The automotive manufacturer is 100% correct in their estimation about splicing a wiring harness. Today’s vehicles are 100% controlled and monitored by electrical and computer operated systems. These systems require a clear and unaltered wiring system that sends electrical signals from sensors and components to the ECU and back. Splicing or altering the wiring in any way is very unsafe and can disable several safety systems including air bags, anti-lock brakes and other systems.
Knock Sensor issue
ANSWER : The sensors are doing their job and telling you there is a knock in the engine. Even though it may seem like the sound went away, you may not be able to hear it when you drive but the sensors can. The knock sensors are designed to produce a voltage when they hear a knock noise from the engine internal parts.
You need to have the noise you hear checked by a mechanic to see what is the cause and what needs to be done in order to fix it.
o2 sensor reads 0 volts.
ANSWER : You may need to look at the code P0122 since it pertains to the throttle position sensor and this can affect all the drive symptoms you are having. The O2 sensor readings seem to be normal and you are not getting any O2 sensor codes. Your reading of between .2 and .4 volts shows that the converter is doing its job and you have high O2 in the exhaust flow. This is a common and normal reading. When the catalyst is new you may not see the O2 sensor go above .45 volts but as a catalyst ages the sensor will switch more often above the .45 volts until it cannot clean the exhaust anymore. I’d suggest getting some help with a certified technician, such as one from YourMechanic, they will help you diagnose your Check Engine Light further and help you fix it accordingly.
How can I find the correct chassis wiring harness for my truck?
ANSWER : The harnesses are referred to in GM parts catalogs as "body wiring" and "rear lamp wiring". However, the correct wiring harness for your vehicle can only be found via a VIN number search in the catalog. It can’t be searched simply by "model" due to the large number of vehicle variants, for example RPO codes. There is no way to look up a harness part number without your VIN number so please send it. Unfortunately, many of the wiring harnesses, including many within the two "categories" you are inquiring about are discontinued by GM. Inasmuch as some are available it is still worth looking up and confirming whether you can get it or not, but you may be in a situation where you have to fabricate your own replacement harness which is not a big deal particularly if you have the old one available to use as a template. The biggest issue are the cable terminations but many of those may be standard and thus pigtails will be available. You could actually make a better (higher quality) harness than that originally used on the vehicle. Please let us know how we can assist you further.
Can i use gm part 55591002 for both sensors?
ANSWER : Hi there. Sometimes the material of the contact on a sensor can produce a false reading or not correctly connect to the electrical harness; so if your trying to test the sensor to see if it works, and the OEM sensor is made of a different component or designed for a different use, it’s probably not best to try that. I’m not sure if it would negatively impact the ECU, but I have seen stranger things cause communication errors.
O2 sensors changed, but check engine light still showing code after clearing it I checked fuse. Wires are good and used Denso OE.
ANSWER : Depending on what the code was for will determine if the oxygen sensor was to be replaced. If the conditions were for a rich or lean mixture and it said oxygen sensor, then the spark plugs and wires could need replaced if its a rich reading or the fuel injectors could be clogged or not working if its a lean mixture. If the code said that the oxygen sensor was bad, then check the harness and see if there is a break in the wiring or a short to ground in the wiring from the oxygen sensor to the main harness. If you need further assistance with your check engine light being on, then seek out a professional, such as one from Your Mechanic, to help you.
How much does it cost to replace the wiring harness on my truck?
ANSWER : Billing question sent to CS for the cost of replacing the wiring harness on a 2001 Dodge Dakota V8-4.7L.
