P20DE Diagnostic Trouble Code

P20DE 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 P20DE diagnostic trouble code may include:

Hesitation upon acceleration
Excessive exhaust leak
Rich or lean exhaust
The engine oil will exhibit dilution from the ECUs attempts to increase engine temperature. Some vehicles advance the fuel injection timing slightly after top center to afterburn a small amount of fuel to increase exhaust temperatures. Some of this fuel enters the crankcase. When the ECU determines the necessity to regenerate the DPF, the service life of the oil be shortened significantly

Possible Causes :

Defective ECU strategies or components will prevent proper regeneration
The Mass Airflow sensor is a hot wire that senses the volume of air entering the intake manifold. The computer uses this information to control fuel mixture.
Some aftermarket accessories and performance modifications

Repair Processes :

Look for missing ground strap or a rusty ground where the fuel tank is grounded to the frame. Check for damage to the wiring harness connector. Use the DVOM to test resistance and continuity on all system circuits if actuator and sensor resistance levels are in compliance with manufacturer's specifications. Oxygen sensors signal the engine management computer the amount of oxygen present in the exhaust, which is used in determining and controlling the fuel ratio.

Process Tips

Diagnostic trouble code P20DE 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 P20DE.

Fortunately, P20DE is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P20DE Trouble Code For Specific Cars

P20DE Riley One-point-five Hydraulic Clutch Actuator Valve Circuit Failure
P20DE Seat Ibiza Injector Control Pressure Above Expected Level
P20DE Mercedes B 150 ABS Hydraulic Pressure Differential Switch Input Circuit Failure
P20DE Autovia V8 Aux Heater Glow Plug Circuit Open
P20DE Geely Mk Oil Change Lamp Circuit Failure
P20DE Renault Thalia HO2S Heater Control Circuit (Bank 2 Sensor 2)
P20DE Mercedes S 65 Air Bag Crash Sensor #1 Feed/Return Circuit Short To Ground