Powertrain, generic (extended)

P2533 Ignition Switch On/Start Position Circuit

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2533 is the general fault of the circuit that is live in both the on and the start position of the ignition switch, often called run/crank. Unlike the pure run line it must stay powered while the starter turns, so modules rely on it to remain awake during cranking. Ford lists P2533 in its 2014 BOSS 302S code table with the M marker for the MIL. Ford also published bulletin 21-2244 for 2021 Mustang Mach-E built before 7 July 2021: the MIL could come on with P061A, P1A1E and/or P2533 because of parameters in the powertrain control module, and the remedy is reprogramming the PCM and other modules. Wiring checks still come first on older vehicles. Low and high are P2534 and P2535.

Likely causes

Powertrain module software or parameters (Ford Mach-E 2021, reprogramming per TSB 21-2244)
Fuse or relay fault in the run/crank feed
Loose or corroded terminal at the module

Symptoms

  • MIL on
  • Possible no-start or stall during cranking

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€0–400
Time0.5–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

ignition switchwiring harness

Related codes

P2534P2535P2530P061A

References: performanceparts.ford.com, static.nhtsa.gov.