P1297high severityPowertrain
No Change In MAP From Start To Run
on 1996 Dodge Dakota 5.2L V8 · 4WD
What this code means
The PCM has detected no change in the MAP sensor reading between engine cranking and engine running. Normally, MAP pressure drops significantly when the engine starts and develops vacuum. A flat MAP signal indicates the sensor is not responding.
Symptoms
- Check Engine Light
- Poor engine performance
- Rich running condition
- Black smoke
- Poor fuel economy
Common causes
- Faulty MAP sensor (stuck reading)
- MAP sensor vacuum hose disconnected
- MAP sensor hose blocked or kinked
- Wiring issue providing fixed voltage to sensor
- PCM fault
Diagnostic steps
- Monitor MAP sensor reading during cranking and after start
- Inspect MAP sensor vacuum hose connection and condition
- Apply vacuum to MAP sensor with hand pump and watch reading change
- Test MAP sensor wiring for opens or shorts
- Check 5V reference and ground circuits
Repair notes
Replace the MAP sensor if it does not respond to vacuum changes.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1