P1612 Diagnostic Trouble Code

P1612 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 P1612 diagnostic trouble code may include:

Reduction in engine performance, especially at low RPM levels
Vacuum leak on the engine
Diminished fuel efficiency
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Low fuel pressure caused by a clogged filter, failing fuel pump, failed fuel pressure regulator or clogged or leaking injectors.
Dirty air cleaner element Damaged DPF

Repair Processes :

Find out what kind of system you have and verify that voltage to the fuel level sensor is present at the fuel pump wiring harness. Replace the oxygen sensor that is downstream from the catalytic converter on the side of the engine that does not contain cylinder #1. Also, if a oxygen sensor code stating "heater circuit malfunction" the sensor has most probably failed. Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed.

Process Tips

Diagnostic trouble code P1612 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 P1612.

Fortunately, P1612 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

P1612 Trouble Code For Specific Cars

P1612 Daimler 4.5-litre Hazard Flash Output Circuit Short To Ground
P1612 Pontiac Silver Streak Flash To Pass Switch Circuit Open
P1612 Chery A5 Double Lock Timeout Failure
P1612 Mg F Air Suspension RR Air Spring/Shock Solenoid Output Circuit Short To Ground
P1612 Datsun 2000 High Load Neutral/Drive Fault
P1612 Daihatsu Mira Generator Lamp "L" Control Circuit Malfunction
P1612 Ssangyong Stavic Lamp Headlamp Input Circuit Failure