U0070 Diagnostic Trouble Code

U0070 is a kind of OBD-II Diagnostic U-Network 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 U0070 diagnostic trouble code may include:

The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.
Faulty PCM
If the DPF is not cleared the ECU will revert to the "Limp Home Mode" until the situation is corrected
Diminished fuel efficiency

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.
Fuel with a large percentage of sulfur will clog the DPF quickly

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. If the engine displays a miss and there wasn't a code, determine which cylinder is misfiring. If the exhaust manifold is visible, spay or pour a small amount of water on each cylinder exhaust port. Water will evaporate immediately on good cylinders and slowly on the missing cylinder. If this can't be accomplished pull the plugs and check the condition.

Process Tips

Diagnostic trouble code U0070 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 U0070.

Fortunately, U0070 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

U0070 Trouble Code For Specific Cars

U0070 Ferrari Rossa Key Off Voltage Low
U0070 Ascari Fg-t Air Suspension RF Air Spring Solenoid Output Circuit Failure
U0070 Lutzmann Lutzmann Traction Control Valve LF Circuit Open
U0070 Mercedes-benz Vision Air Suspension Height Sensor Power Circuit Short To Battery
U0070 Renault Megane 2 Heated Backlite Input Circuit Short To Battery
U0070 Amc Ambassador Air Suspension Front Height Sensor High (SE) Signal Circuit Failure
U0070 Chevrolet Impala 9 Dynamic Stability Control Left Rear Valve Malfunction