P266E Diagnostic Trouble Code

P266E 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 P266E diagnostic trouble code may include:

Poor acceleration
Cherry red hot catalytic converter
Possible spark knock (detonation / pre-ignition)
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

An air leak forward of the DPF will change the sensor readings resulting in the code
Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

Once located, visually inspect the connectors and wiring. Look for rubbing, scraping, bare wires, worn spots or melted plastic connectors. 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.

Process Tips

Diagnostic trouble code P266E 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 P266E.

Fortunately, P266E is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P266E Trouble Code For Specific Cars

P266E Cunningham C5 Fuel Temperature Sensor #1 Circuit Short to Battery
P266E Mazda 2000 Transmission Transfer Case Contact Plate 'B' Short Circuit To Battery
P266E Lanchester Ten Speed Wheel LR Input Signal Missing
P266E Volvo Xc70 Ii SCP (J1850) Invalid or Missing Data for Function Read Engine Torque
P266E Saab 9-2
P266E Bmw 228 Camshaft Position Sensor Circuit Low Input
P266E Zastava 132