P305D Diagnostic Trouble Code

P305D 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 P305D diagnostic trouble code may include:

Blown fuse (if applicable)
Engine surge
Reduction in engine performance, especially at low RPM levels
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)
Dirty air cleaner element Damaged DPF

Repair Processes :

It should be pretty close to battery voltage (12 volts). If not, then this is the circuit that has the problem. 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.

Process Tips

Diagnostic trouble code P305D 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 P305D.

Fortunately, P305D is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P305D Trouble Code For Specific Cars

P305D Pontiac G6 Exhaust Valve Control Solenoid Circuit (Bank 1)
P305D Renault Type Xa HO2S Heater Control Circuit Low (Bank 2 Sensor 1)
P305D Sunbeam Tiger MAP/MAF Throttle Position Correlation
P305D Volkswagen Golf 3 Ride Control LR Shock Actuator Circuit Short To Ground
P305D Caterham C Door Ajar RR Circuit Short To Battery
P305D Datsun Z HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P305D Lancia Astura Speed Wheel Sensor LF Coherency Fault