Your Toyota Cressida engine control system detects a problem, the computer stores the diagnostic trouble
code P3221 in its memory.
To figure out what is wrong with your vehicle you must first extract the P3221 DTC For Toyota Cressida.
A good ground connection is also extremely important. P3221 Toyota Cressida engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).
P3221 Toyota Cressida DTC Meaning
Powertrain Code - Problem is related engine, transmission and emissions systems.
SAE - Generic
Computer And Auxiliary Outputs
Cruise Control Servo Indicates Low
PCM Stack Overrun
If your P3221 Toyota Cressida check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system P3221 and engine control unit are in charge of monitoring a bunch of different P3221 DTC For Toyota Cressida, and if they get a reading that's a little out of whack, up pops the check engine light.