error codes with check engine light... fixed

[Cbozz]

So I've been getting some persistent codes that trigger a check engine light..
I thought the o2 sensors were possibly bad because it was showing bank 1 issues so I replaced the sensor in bank 1 but the codes came back after 20 miles... no limp mode or reduced power, car is running normally.. anyone had issues with this? it says Knock sensor 1... could it be a bad coil or something?

first one keeps coming back:

27E2 - knock sensor 1 ------ fixed by tightening exhaust by the header gasket

278D - radiator outlet temp sensor ----- fixed by replacing a radiator outlet temp sensor.
2AFB - intake air temperature sensor bank 1

there was also these before at some point

2728-LR adaptation multiplicative range 2
2729-LR adaptation multiplicative area 2 (bank 2)


any help is appreciated!! thanks guys

[Cbozz]

Could it be a bad coil or thermostat? Anyone experienced those codes before?

[Cbozz]

ok after talking to some guys on the forum here seems like this may be related to my recent BBK upgrade and flushing/ topping off brake fluid and possibly some fluid spilled over onto the brake booster sensor that's directly underneath the brake fluid reservoir. Just ordered a new sensor and will be replacing it soon and follow up.

[L4ces]

Good luck, hope that's it

[Cbozz]

Originally Posted by L4ces

Good luck, hope that's it

OK, just changed up the brake booster sensor and sensor was dry and appeared to be in perfect condition. checked codes before clearing with friends tool and P013C came up - O2 sensor bank 2 sensor 2. cleared all codes and drove about 20 miles and errors came back up this time:

27E2 - knock sensor 1
278D - radiator outlet temp sensor

read with my INPA

can someone chime in..?
I'm thinking about replacing bank 2 pre cat o2 sensor..
I have a tune so post cat sensor should not be throwing codes... anyone??

[Cbozz]

Originally Posted by Cbozz

OK, just changed up the brake booster sensor and sensor was dry and appeared to be in perfect condition. checked codes before clearing with friends tool and P013C came up - O2 sensor bank 2 sensor 2. cleared all codes and drove about 20 miles and errors came back up this time:

27E2 - knock sensor 1
278D - radiator outlet temp sensor

read with my INPA

can someone chime in..?
I'm thinking about replacing bank 2 pre cat o2 sensor..
I have a tune so post cat sensor should not be throwing codes... anyone??

Fixed!

I hope this will help someone!

27E2 - that was caused by exhaust leak.. the test pipe came loose around the header connection and exhaust was leaking a lot

278D - that was caused by a nasty faulty coolant sensor. Sensor replaced and code went away instantly.

drove around a bunch and no codes came back.