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Skyvisions, ASE Certified Technician
Category: Toyota
Satisfied Customers: 14505
Experience:  Toyota Master Diagnostic
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My rav4 is showing engine fault P1251 it happened on a steep

Customer Question

My rav4 is showing engine fault P1251 it happened on a steep incline, parked it up somewhere safe, after 10 minutes started her back up and she ran ok but the management light if still on - what causes this to happen/
JA: Just to clarify, what are the exact lights you're talking about?
Customer: engine management light on instrument panel
JA: What year is your RAV4?
Customer: 54 plate
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: Some flushing to the fuel
JA: Anything else you think the mechanic should know?
Customer: Lucas upper cylinder lubricant and injector cleaner
Submitted: 1 year ago.
Category: Toyota
Expert:  Skyvisions replied 1 year ago.

Do to the fact that it occurred while on a steep incline this would indicate there is a malfunction in the Turbo system and the extra load on it.. This code sets whenever the Turbo system detects excessive pressure. Listed below are your possible options if the wastegate or the VN turbo vane is stuck closed.

  • Turbocharger sub-assembly
  • VN turbo link stuck malfunction
  • Extremely low battery voltage (P0560 stored simultaneously)
  • Intake system
  • Exhaust system
  • Electric EGR control valve assembly
  • EGR cooler
  • Injector assembly
  • Diesel throttle body assembly
  • ECM