Stalling at idle when warm P0102

[goldxc70]

XC&), MY '04.
First happened a couple of weeks back: accelerating gently on open road, "reduce(d) power" message briefly appeared, engine cut out, pulled out of traffic and tried to restart but nothing. After leaving it a while to cool down (maybe 20 minutes), it restarted normally and I drove home. Later that same day, it started normally but when I tried to back out of parking space, it stalled repeatedly. Left it overnight and it started fine the next day. Checked all the usual things and cleaned the MAF with sensor cleaner. OBD reader gave me a P0102 code and nothing else. After resetting it, I get the same code immediately but it runs fine. Checked MAF connector and 12v, 5v and GND all check out. MAF reading seems odd (jumps between 0.25 and 0.5 g/s) but this could be the budget tools I'm using. The fuel pump and filter are relatively new having been changed a few years back. My car doesn't have a fuel pressure sensor on the rail.

I have a new MAF and happy to try that but wanted to know if there is anything I should look at before doing that.

[RickHaleParker]

Possible source

• Flow too high:
  • short-circuit to supply voltage in the signal cable
    open-circuit in the ground lead
    defective sensor
  Flow too low:
  • Air leakage
    contact resistance
    Contaminated throttle body (TB).
    short-circuit to ground in the signal cable
    open-circuit in signal cable
    open-circuit in power supply cable
    Defective sensor