Dodge 2004 Neon SRT4, Diagnostic Manual

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Symptom:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE
When Monitored and Set Condition:
P0129-BAROMETRIC PRESSURE OUT-OF-RANGE
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 greater than 4.9
volts (2.4 volts Turbo) but below 2.28 volts (1.2 Turbo) of a volt for 300 milliseconds. One
Trip Fault.
POSSIBLE CAUSES
IAC SIGNAL CIRCUIT LOW
IAC SIGNAL CIRCUIT HIGH
INTERMITTENT CONDITION
(K7) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE
(K7) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K7) 5 VOLT SUPPLY CIRCUIT OPEN
MAP SENSOR INTERNAL FAILURE
(K1) MAP SIGNAL CIRCUIT OPEN
(K1) MAP SIGNAL CIRCUIT SHORTED TO GROUND
PCM (K7) 5 VOLT SUPPLY CIRCUIT
PCM (K1) MAP SIGNAL
TEST ACTION APPLICABILITY
1 NOTE: Refer to any TSBs that may apply to this DTC before proceeding.
Ignition on, engine not running.
With the DRBIII
t
, read the MAP Sensor voltage.
Is the voltage greater than 4.9 volts (2.4 volts turbo).
All
Yes
→
Go To 3
No
→
Go To 2
2 Ignition on, engine not running.
With the DRBIII
t
, read the MAP Sensor voltage.
Is the voltage below 2.28 volts (1.2 volts Turbo).
All
Yes
→
Go To 3
No
→
Go To 12
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DRIVEABILITY - NGC