Dodge Ram 2003 with hemi

Asked by GuruCN22Y Feb 26, 2019 at 01:14 PM about the 2003 Dodge RAM 1500 ST RWD

Question type: Maintenance & Repair

Dodge Ram 2003 won't start. Computer said bar metric
pressure low mean.

2 Answers

2,600

Barometric pressure comes from the map sensor at key on engine off and wide open throttle position bc there is no engine vacuum at that point... low means you probably have a shorted map sensor

2,600

Use a volt meter and back probe the signal wire with the key on and sensor unplugged, its a three wire sensor... 5 volt power wire, 5 volt signal wire and a ground... the signal wire should not be pulled to ground with just the key on while plugging the sensor in

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