P1128moderate severityPowertrain
MAP Sensor Value Lower Than Expected
on 2009 Acura RL 3.5L V6 · AWD
What this code means
The MAP sensor reading is lower than expected for current conditions.
Symptoms
- CEL
- Poor performance
- Lean condition
- Hesitation
- Rough idle
Common causes
- Vacuum leak
- Faulty MAP sensor
- Clogged vacuum line
- Faulty PCM
Diagnostic steps
- Check for vacuum leaks
- Test MAP sensor
- Inspect vacuum line
- Compare readings
Repair notes
Fix vacuum leak or replace MAP sensor.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1