DTC P0069: Abnormal Correlation Between Manifold Absolute Pressure Sensor And Barometric Pressure Sensor

TECHNICAL DESCRIPTION

• The ECM detects abnormality in the sensor by comparing the manifold absolute pressure sensor output with the barometric pressure sensor output.
  

DESCRIPTIONS OF MONITOR METHODS

The ECM compares the manifold absolute pressure sensor output with the barometric pressure sensor output while the engine control relay is in "ON" position after the ignition switch is in "LOCK" (OFF) position. When the difference exceeds the specified value between them, the ECM determines whether the manifold absolute pressure sensor / the barometric pressure sensor has malfunction or not.

MONITOR EXECUTION

Continuous

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

• Not applicable
  

• Not applicable
  

DTC SET CONDITIONS

• Ignition switch is in "LOCK" (OFF) position.
  
• After 2 seconds pass from the time when the engine is stopped.
  
• Engine coolant temperature is higher than 0°C (32°F).
  

• Difference between manifold absolute pressure sensor output and barometric pressure sensor output is more than 9 kPa (2.7 in.Hg) for 2 seconds.
  

OBD-II DRIVE CYCLE PATTERN

None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)

• Manifold absolute pressure sensor failed.
  
• Barometric pressure sensor failed.
  
• ECM failed.
  

caution To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958. (1)Connect scan tool MB991958 to the data link connector. (2)Turn the ignition switch to the "ON" position. (3)Set scan tool MB991958, read the DTC. (4)Turn the ignition switch to the "LOCK" (OFF) position. Q. Is the diagnostic trouble code other than P0069 set? Refer to, Diagnostic Trouble Code Chart . Go to Step 2.

(1)Turn the ignition switch to the "ON" position. (2)Set scan tool MB991958 to the data reading mode for item 8, Manifold Absolute Pressure Sensor. When altitude is 0 m (0 foot), 101 kPa (29.8 in.Hg). When altitude is 600 m (1,969 feet), 95 kPa (28.1 in.Hg). When altitude is 1,200 m (3,937 feet), 88 kPa (26.0 in.Hg). When altitude is 1,800 m (5,906 feet), 81 kPa (23.9 in.Hg). (3)Start the engine. When the engine is idling, 16 - 36 kPa (4.7 - 10.6 in.Hg). When the engine is suddenly revved, manifold absolute pressure varies. (4)Turn the ignition switch to the "LOCK" (OFF) position. Q. Is the sensor operating properly? Go to Step 3. Refer to, DTC P0106 - Manifold Absolute Pressure Circuit Range/Performance Problem , DTC P0107 - Manifold Absolute Pressure Circuit Low Input , DTC P0108 - Manifold Absolute Pressure Circuit High Input .

(1)Turn the ignition switch to the "ON" position. (2)Erase the DTC. (3)Start the engine. (4)Turn the ignition switch to "LOCK" (OFF) position and then wait 2 seconds. (5)Turn the ignition switch to the "ON" position. (6)Set scan tool MB991958, read the DTC. (7)Turn the ignition switch to the "LOCK" (OFF) position. Q. Is DTC P0069 set? Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, ID Code Registration Necessity Judgment Table <Vehicles with KOS> or GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> . Then go to Step 4. It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .

(1)Turn the ignition switch to the "ON" position. (2)Erase the DTC. (3)Start the engine. (4)Turn the ignition switch to "LOCK" (OFF) position and then wait 2 seconds. (5)Turn the ignition switch to the "ON" position. (6)Set scan tool MB991958, read the DTC. (7)Turn the ignition switch to the "LOCK" (OFF) position. Q. Is DTC P0069 set? Retry the troubleshooting. The inspection is complete.