MAP / Air Pressure Sensor Fault (C13) and Replacement

[gsxbarmy]

The Intake Air Pressure (IAP) sensor detects the intake air pressure, which is then converted into voltage signal and sent to the ECM. The basic fuel injection time (volume) is determined according to the voltage signal (output voltage) which increases when the intake air pressure is high. Problems with the IAP Sensor are communicated by code C13 being displayed on the dashboard. Whilst the IAP Sensor can be tested, should it be faulty, it cannot be repaired and a replacement part should be fitted.

The attached document describes removal, testing and sourcing a replacement.

[Hooli]

It's worth nothing this is only used at low throttle/low revs, above certain points (not quoted in the manual) the ECU just uses the TPS/revs to calculate the volume of intake air. So running problems won't be apparent except when ridden slowly or at idle.

Also it's the same part as the ambient air pressure sensor on the side of the airbox so they can be swapped to confirm a faulty sensor.

[Eric GSX1400K3]

So does this mean that a faulty IAP sensor could also cause jerky throttle control at low rpm?

[Hooli]

I guess so, I'd suspect similar effects to split vacuum pipes at a guess.

The bike will run with the MAP sensor unplugged & just use the TPS/revs to calculate the fuelling, so that's an easy test for you. Of course if the vacuum pipes are damaged you'd probably get poor running still.

[Alexandromeda]

My bike is cutting out on overrun/engine braking throttle off. could this be IPS?

[Hooli]

My bike is cutting out on overrun/engine braking throttle off. could this be IPS?

Possible but I've not seen a faulty one.

It's the same part as the ambient pressure sensor fitted to the RH side of the airbox, so swap them & see if the fault goes.

I'd still be looking at airleaks, possibly from the vacuum pipes from your fault.

Worth noting though that K5 onwards run lean as standard & cans etc make that worse so it could just be that causing it. A mate's K5 with twin cans n stuff occasionally does the same & can't be fixed without a PC3/5 & tune etc so she rides around it.

[Alexandromeda]

Cheers Hooli. Bike rides fine when going steady. It seems that after a fast straight and hard on the brakes blipping throttle and changing down. Sometimes it cuts out. I have changed the can and link pipe for MTC. It had these symptoms before the can swap but not as often. Pairs is intact. New OEM air filter. TPS set from 1240 to 1136. Throttle bodies balanced. I don't ride too often, sometimes weeks between rides. Not done plugs or tank filters. Mileage is 24700 miles. K7FE. Never used a Power commander. Maybe I should get one? New 6 any good for 1400?