P1607
ECM/PCM Internal Circuit Failure A
1997-1997 Acura CL 2.2L I4
High SeverityPowertrain
The 1997 Acura CL is equipped with a 2.2L inline-4 engine. Below you'll find detailed p1607 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Internal ECM/PCM circuit malfunction, often during cold weather.
Symptoms
- CEL
- Rough running
- TCS light
- Erratic shifting
- Stalling
- Tach reads zero
Common Causes
- Bad solder joints
- Cold-sensitive components
- Low battery
- Corroded connectors
Diagnostic Steps
- Check battery voltage
- Inspect ECM connectors
- Monitor during cold start
- Test ECM outputs
Repair Notes
Replace or repair ECM/PCM.
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1607 on Other Vehicles
Common Questions
What does code P1607 mean on a 1997-1997 Acura CL?
P1607 stands for "ECM/PCM Internal Circuit Failure A". Internal ECM/PCM circuit malfunction, often during cold weather.
What are the symptoms of P1607 on a Acura CL?
Common symptoms of P1607 include: CEL, Rough running, TCS light, Erratic shifting, Stalling, Tach reads zero.
What causes P1607 on a 1997-1997 Acura CL?
Common causes of P1607 include: Bad solder joints, Cold-sensitive components, Low battery, Corroded connectors.
Last updated: March 2026