P2102

Depends on what is the cause of the error. The article mentions some causes. Error codes are vague, and very often cover a range of subsystems, so knowing what needs to be fixed is difficult.

For example, I had an error code that resolved to some "evaporator" problem. I replaced the gas cap with a generic cheapie a year ago, the code did not come back for a year (I have an ODB2 dongle with Android app that lets me reset the codes), but it did come back. To find the problem, the shop did some vacuum tests along with a smoke test. The cost was $150 for just the testing. They found the leak at the gas cap. This time I replaced it with a Subaru OEM fuel cap. Won't know if that fixes the problem until about 100 miles put on the car, but this car only gets about 1500 miles on it per year, so it'll be a few months before I know for sure the cap was the problem. The cap cost $25 from a Subaru dealer's parts shop. If the problem was with the canister, a fuel line (likely a rubber hose to the tank), the filler neck to the gas tank, or something else then the actual repair cost (for part and labor to replace it) would be a lot more expensive.

You'll have to take your car to a shop to have them do further tests to isolate the cause of the error code. Error codes are not one-to-one with the source of the error code.

You could ask your sh The PCM receives inputs to determine when and how long it needs to operate the TA-A. These inputs are voltage signals received from coolant temp, intake air temp, engine rpm and air conditioning system pressure sensors. Once the PCM has received these inputs it can modify the signal to the TA-A.

Well, could be any of those sensors that has failed. Replacing those would be a lot cheaper than a motor that's part of the throttle body assembly.

I've never gotten into deep use of the Android app with the OBD2 dongle. I have the following apps:

About 2 years, I decided to pay the $5.32 to up to the Pro version of the Torque app. I don't see that I paid for the OBDLink MX app (probably was part of their $55 dongle product telling you to go their site to get their app).

I have the OBDLink MX Bluetooth dongle. The MX model has red printing while the MX+ model has yellow printing. I don't see the MX model is sold anymore

I got mine probably about 4 ago at half the cost for the new MX+ model. It doesn't do any diagnostics, because it can't. It just reads the error codes from the car's ECM. One of the OBD apps can do logging to delve further into the cause of an error code, like discovering which spark plug has the wrong cable attached to it, but haven't yet needed to that deep into using the apps. Other than to see the error code, and get more info on it from their database, I've used it to reset the error codes in the car's ECM after making a repair or change to see if and when the error code(s) reappear.

Ask the shop how much to *diagnose* the error code. A scan is probably free, but the labor to find the cause is not.

What city are you near? You could post over at

, or at the Forester Forum.

Sometimes, a bad battery will cause spurious codes, or, bad ground connections. With covid and business closures reducing travel, some people are finding rodent damage in cars that are unused for long periods of time.

A subaru-friendly independent shop would be my preference if I couldn't fix it myself.

I think you are on to something there. My battery miserably failed its deep cycle test.

Do my subi back from the shop yesterday:

1,320 U$D: battery, injectors, spark plugs and wires, air cleaner, timing belt, water pump, oil and filter; flush power steering and brake fluid, tire rotate, thermostat, oil cooler.

No more burning oil smell. And my subi is now rock solid when I accelerate: no more spongy pedal. It run like a new car now. I am very pleased.

Got my

Stinkin' typos