P1129

DTC P1129: MAP Sensor Signal Higher Than Expected

NOTE: Before you troubleshoot, record all freeze data and review the general troubleshooting information.

1. Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
2. Check the MAP with a scan tool or the HDS.

Is about 36.9 kPa (10.9 in.Hg, 277 mmHg), or 1.1 V or less indicated?

YES - Intermittent failure, system is OK at this time.

NO - Replace the MAP sensor.