B1570 Diagnostic Trouble Code

B1570 is a kind of OBD-II Diagnostic B-Body 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 B1570 diagnostic trouble code may include:

Fuel pressure too low
Rich or lean exhaust
Diminished fuel efficiency
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)
Faulty IMRC actuator/sensor

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.

Process Tips

Diagnostic trouble code B1570 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 B1570.

Fortunately, B1570 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1570 Trouble Code For Specific Cars

B1570 Holden Rodeo Power To Fan Circuit Overcurrent
B1570 Toyopet Crown Motor Temperature Out of Range
B1570 Mercedes E 280 ABS Power Relay Output Short Circuit To Battery
B1570 Nardi Blue Catalyst Damage
B1570 Gaz 27 O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
B1570 Lotus 2-eleven Torque Converter Clutch Inductive Signature Malfunction
B1570 Mercedes R Class Accessory Delay Relay Coil Circuit Short To Ground