P1607 Diagnostic Trouble Code

P1607 is a kind of OBD-II Diagnostic P-Powertrain Diagnostic Trouble Code.

It is considered generic because it applies to all makes and models of vehicles, although specific repair steps may be different depending on your car model.

Symptoms

Symptoms of a P1607 diagnostic trouble code may include:

Rich or lean exhaust
Fuel pressure too low
Engine surge
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected

Possible Causes :

A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Faulty IMRC actuator relay (if equipped)
Faulty IMRC actuator/sensor

Repair Processes :

If the scan tool has that capability, and the scan tool can operate the IMRC valves, then the problem is either resolved and a simple code clearing is all that's left or a new PCM would be called for. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code P1607 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P1607.

Fortunately, P1607 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1607 Trouble Code For Specific Cars

P1607 Ford Galaxie Mirror Driver Horizontal Switch Circuit Open
P1607 Subaru Forester Left Front Sensor Circuit Short to Vbat
P1607 Chrysler Conquest Engine Speed Input Circuit Intermittent
P1607 Caterham Superlight Door Handle Right Front Short To Battery
P1607 Lancia Trevi Starter Disable Circuit Malfunction
P1607 Intermeccanica Indra SCP (J1850) Invalid or Missing Data for Legislated Diagnostics
P1607 Bmw Touring Coast Clutch Solenoid Circuit Malfunction