Symptom:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
When Monitored and Set Condition:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE LOW
When Monitored: With the ignition key on. No Cam or Crank signal within 75 ms. Engine
speed at less than 250 RPM.
Set Condition: The PCM senses the voltage from the MAP sensor to be less than 2.196
volts but above 0.0392 of a volt for 300 milliseconds.One Trip Fault.
POSSIBLE CAUSES
IAC SIGNAL CIRCUIT LOW
IAC SIGNAL CIRCUIT HIGH
INTERMITTENT CONDITION
(K6) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K6) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K6) 5 VOLT SUPPLY CIRCUIT OPEN
MAP SENSOR INTERNAL FAILURE
(K1) MAP SIGNAL CIRCUIT OPEN
(K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND
PCM (K6) 5 VOLT SUPPLY CIRCUIT
PCM (K1) MAP SIG CIRCUIT
TEST ACTION APPLICABILITY
1 NOTE: Refer to any TSBs that may apply to this DTC before proceeding.
Ignition on, engine not running.
With the DRBIIIt, read the MAP Sensor voltage.
Is the voltage below 2.2 volts.
All
Yes → Go To 2
No → Go To 11
2 Turn the ignition off.
Disconnect the MAP Sensor harness connector.
Ignition on, engine not running.
Measure the voltage of the (K6) 5 Volt Supply circuit in the MAP Sensor harness
connector.
Is the voltage between 4.5 to 5.2 volts?
All
Yes → Go To 3
No → Go To 7
86
DRIVEABILITY - NGC
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