Car is currently in safe mode. Recent trouble codes pulled: P1122, P1128, & P0327 (knock sensor).

Happened a few times recently and intermittedly. This morning I cleaned MAF, Throttle Body, and Crank Position sensor and their harnesses all while battery disconnected. Performed the learning procedures for Idle Air and Throttle Position afterwards.

Now I'm stranded at a church miles from home with the same problem...car goes into safe mode and won't rev past 1500rpms. Performed manual ECU reset procedure but problem still exists.

Please help

I can get tools and am close to a parts store.

 

unhook the battery for like half hour and pump your brakes a bunch of times and see if it resets..i would just go get the code reader at the nearest parts store also if you dont have one and keep clearing it and seeing if it keeps coming right back...

 

Left battery unplugged for a few hours but problem still exists.

I made a mistake saying it was code P0367 when it is in fact P0327, Knock Sensor. I'm wondering which would cause the other to fail as it seems unlikely they would both go bad simultaneously. Thoughts?

 

Managed to get car back to house and have begun diagnosing.

According to FSM, the P1122 & P1128 codes triggered "Fail-Safe" mode so I'm assuming the knock sensor is a byproduct (read it's also a "ghost" code) and will not trouble shoot it for the time being.

Pins 3 & 6 on the TB harness measure 1.933 Ohms which checks out. Now it's off to measure the ECM to TB.

Any help greatly appreciated.

 

Check grounds but its most likely failed throttle body.

 

I had the knock sensor issue but it wasn't that bad...to my understanding the knock sensor hardly ever goes bad and its typically a damaged harness that is maybe pinched or not seated. P0327 is a low circuit input to the censor IIRC

 

I ordered the TB today. Was able to ensure the Knock Sensor harness was secure with a long flathead screwdriver so after TB replacement and ecu reset, if it pops up again I'll troubleshoot it. Thanks for your input guys and I'll post up after fix.

 

Replaced the throttle body and did a 20 mile drive without any problems. Hopefully that was the end of it. No check engine lights.

 

Still no problems. I've noticed the car performs better as well. First gear was always a bit tricky however now I'm thinking the throttle body wasn't performing as it should when hitting the gas just a little bit...hence "low voltage" DTC's. Now I don't sound like a rookie putting the car into 1st gear.

 

where did you get the throttle body? hopefully your problems are gone ..

 

From a local parts dealer here in Atlanta, Customer Valet LLC in Snellville. It's a used OEM unit and came with a 90-day warranty.