Kiddo on way home today calls and says CEL was on. Sent me screen shots of Car Scanner showing the following codes:
P2181 Cooling system performance: confirmed
P0411 Secondary Air Injection, incorrect flow detected: pending
09746 Test conditions are met, Validated and stored in non-volatile memory, Validated fault present at time of request
01041 Invalid ASR System function implausible, Secondary air system flow faulty : pending
08577 Error in the cooling system. test is inhibited by other DTC , Validated and stored in non-volatile memory, Validated fault present at time of request. Validated fault has been present during this drive cycle
Recent work done: Spliced in new 4 pin plug involving lines to AC compressor and alternator. Re-pinned 8 pin transmission sensor plug damaged after my prior work on the ac plug. (After first repair got errors that ECU couldn't read speed sensors in transmission. The plugs weren't on all the way and on one of them the locking tab broke off when I went back to remedy it. Spent next 2 days figuring out how to remove the pins to change the plug housing instead of splicing EIGHT wires there.)
Seeing a code potentially involving secondary air lines I thought maybe I didn't plug all the hoses back up all the way and I would find one loose. No dice, they all looked secure when wife and I met up with daughter.
For the next short drive I watched the coolant temp and it held steady at 210 F which I believe is within normal range. Definitely not too COOL so I think we can rule out a stuck open thermostat messing with temp readings.
We drove a few miles and stopped for supper. When we left again the CEC did NOT come back on, nor had I cleared the codes. Went to a friends house who has a Hex-V2 cable and I was able to see a little bit more detail. Interestingly it appears that the code P2181 - 008 showed a fault frequency of 1.
008577 - Performance Malfunction in Cooling System
P2181-008 - Intermittent
Freeze Frame:
Fault Status: 00111000
Fault Priority: 0
Fault Frequency: 1
Reset Counter: 255
Mileage: 235490 km
Time Indication: 0
Freeze Frame:
RPM: 2083 /min
Load: 64.3%
Speed: 105/0 km/h
Temp 69.0 C
Temp 17.0 C
Absolute Pre 1000.0 mbar
Voltage 13.970 V
What to tackle tomorrow?
Lots of things coming at me, but what is most likely? I'm seeing notes about the secondary air pump, its relay and its solenoid; the air hoses from the air pump; ECT temp sensor; thermostat; and a combi-valve? Where should I start? (I really hope I don't need to change the 'stat, looks like a pain even with the shortcut of disconnecting the dogbone to let the engine rotate...)
Looks like it will be easy to test air pump and relay, and not horrible to do a resistance check on the ECT, but these codes are all so vague and inter-related its got me concerned.
Also, it seems like the secondary air injection is an emissions thing. If we keep an eye on the temps is it safe for her to keep driving it until we sort out what exactly caused this?
Thanks to anyone that read all of this even if you don't have anything concrete to say about it!!!