P1607high severityPowertrain
ECM Internal Fault - Engine Speed Output Signal
on 2006 Mazda MPV 3.0L V6 · FWD
What this code means
The ECM has an internal fault affecting the engine speed output signal. No direct generic OBD equivalent; treat as internal module failure.
Symptoms
- Check engine light on
- Tachometer erratic or dead
- Poor engine performance
Common causes
- Faulty ECM
- ECM internal circuit failure
- Poor ECM ground
- Corroded ECM connectors
Diagnostic steps
- Scan for stored codes
- Check ECM power and grounds
- Inspect ECM connectors
- Reflash or replace ECM
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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
P0005
Fuel Shutoff Valve A Control Circuit/Open
P0006
Fuel Shutoff Valve A Control Circuit Low
P0007
Fuel Shutoff Valve A Control Circuit High
P0008
Engine Position System Performance - Bank 1
P0009
Engine Position System Performance - Bank 2
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1