P177E Diagnostic Trouble Code

P177E 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 P177E diagnostic trouble code may include:

Excessive exhaust leak
Hesitation upon acceleration
Malfunction Indicator Lamp (MIL) illuminated
Rich or lean exhaust

Possible Causes :

Faulty IMRC actuator relay (if equipped)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.

Repair Processes :

You might continue by connecting the scanner to the vehicle diagnostic connector and retrieving all stored codes and freeze frame data. 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. Look at the plug wires to make sure they are not burnt or laying on the exhaust.

Process Tips

Diagnostic trouble code P177E 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 P177E.

Fortunately, P177E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P177E Trouble Code For Specific Cars

P177E Volvo S60 SCP (J1850) Invalid or Missing Data for Experimental #1
P177E Fiat Scudo Lateral Accelerometer Sensor Circuit Failure
P177E Hupmobile 6 RightRear Sensor Circuit Short to Vbat
P177E Chevrolet Grand Blazer Dual Alternator Lower Circuit Malfunction/ Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent Low Voltage
P177E Honda Beat Pressure Control Solenoid C Intermittent
P177E Mg X80 Ambient Air Temperature Sensor Circuit
P177E Maserati Mexico Transmission Fluid Pressure Sensor/Switch F Circuit Low