B1262 Diagnostic Trouble Code

B1262 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 B1262 diagnostic trouble code may include:

Lack of power
Faulty O2 Sensor
Poor acceleration
The light may stay on or light intermittently as the DPF regenerates. The engine will be sluggish on acceleration.

Possible Causes :

Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

Repair Processes :

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. 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. Pack the connector cavity with dielectric silicone compound (same stuff they use for light bulb sockets and spark plug wires) and reassemble.

Process Tips

Diagnostic trouble code B1262 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 B1262.

Fortunately, B1262 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

B1262 Trouble Code For Specific Cars

B1262 Citroen C5 Fuel Composition Sensor Circuit Malfunction
B1262 Spyker 12 Lamp Brake Warning Output Circuit Short To Ground
B1262 Mercedes Clc ABS Outlet Valve Coil LF Circuit Open
B1262 Healey Nash-healey Passenger's Front Seat Down Switch Circuit Short to Battery
B1262 Vauxhall Antara Power Window RR Motor Circuit Short To Battery
B1262 Ford St Mirror Passenger Up Circuit Open
B1262 Triumph 1500 Passenger's Front Seat Down Switch Circuit Short to Battery