P0171 Powertrain
 

As above - system too lean (bank 1) fault.

I have cleaned and refitted the MAF but not resolved the problem.

I get the occasional stall if hard accelerating then braking to a stop.
Idling can be a little dogged.
When accelerating in higher gears the engine will over rev then flatten out so like in 4th gear the revs will shoot from 2500 to 5 or 6000 and you hear a surge but the power is flat then it levels back out again.
Petrol consumption seems worse too.

2006 UK Hawkeye.
Front mounted cooler.
Prodrive performace pack
De cat all through.
Chipped.

All was fine this has developed.

Reading there is strong links to oxygen sensor, happy all hoses are good or not the problem all tight and clipped.

Anyone else had similar symptoms and resolved?

Cars not mapped for the mods, running lean and detting by the sounds of it

Congratulations, you have the worse fault code to find the fault with. Have a search of NASIOC forum, I think theres at least 10 things that it could be


Good luck

All sounds possible but I bought the car a few months back with the mods in place and had been mapped with dyno, this has now occurred so am thinking it shouldn't be with nothing else changed...... Or not?

Yep seen many things it can be :(

Was hoping someone else might have had specific symtpoms I have to narrow it down or help me prioritise checks as seems some have more stalling issues, only had 2 and from heavy accelerate to hard brake.
Mine seems to be more in power delivery and pretty sure the fueling is being increased to allow for it as even by Scooby standards half a tank seems to go pretty fast.

Just pulled these test results off of an OBD adaptor:-

Mode $06 report generated by Torque for Android
================================================

Vehicle VIN: BLANKED
Vehicle Manufacturer: Subaru
Vehicle Calibration ID: A8DH200Y
33092304

Unit and scaling information are not supplied with the data from the ECU for this type of vehicle. Consulting the manufacturers service book for this information is recommended.

Test report:
------------------
TID:$41 CID:$01
-
Min: 110
Test result value: 110
PASS
----
TID:$41 CID:$02
-
Max: 50
Test result value: 50
PASS
----
TID:$89 CID:$01
-
Min: 0
Test result value: 65,535
PASS
----
TID:$89 CID:$02
-
Min: 0
Test result value: 65,535
PASS
----


End of report.