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DTC P1129: MAP Sensor Circuit Higher Than Expected (2002-2004 models) Acura RSX I facelift

  1. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on, then let it idle.
  2. Check the MAP with a scan tool or the HDS. Is 36.9 kPa (10.9 in.Hg, 277 mmHg), 1.1 V, or less indicated? YES - Intermittent failure, system is OK at this time. NO - Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(ref-218789-S10770291502006021000000) ).