VOLVO
ECM-P126400 - Cylinder 4 High To Low Side Short. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsC30 (2007–2013), S40 (2004–2013), S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V50 (2004–2013), V60 (2011–), V70 (2008–)
Show models by year and engine (9)
- Volvo C30 (2007–2013)2011–2013Engine D4162T only
- Volvo S40 (2004–2013)2011–2012Engine D4162T only
- Volvo S60 (2011–)2011–2015Engine D4162T only
- Volvo S80 (2007–)2012–2015Engine D4162T only
- Volvo V40 (2013–)2013–2015Engine D4162T only
- Volvo V40 Cross Country (2013–)2013–2015Engine D4162T only
- Volvo V50 (2004–2013)2011–2012Engine D4162T only
- Volvo V60 (2011–)2011–2015Engine D4162T only
- Volvo V70 (2008–)2012–2015Engine D4162T only
What does this fault code mean?
The engine control module (ECM) drives the injectors through two integrated high-power output stages. This code applies to cylinder 4 and is set when the module detects a faulty signal while the engine is running. It gives no further fault type and can be a knock-on fault from another fault in the injectors or fuel system, which should be dealt with first.
Possible causes
- Knock-on fault from a fault detected by another trouble code test for the injectors and/or fuel system
- Damaged injector
What you can do
- 1Check that the fuses are intact. The locations are in the owner's manual or on the fuse box cover.
- 2Go through the other stored codes. Deal with any faults on the injectors or fuel system first, because the cylinder 4 code may be a knock-on from them.
- 3With a diagnostic tool, the injector for cylinder 4 can be activated. Listen for a click and compare with the other cylinders.
- 4Check that the connector to the cylinder 4 injector is secure and free from corrosion.
- 5If the fault returns, have a workshop with diagnostic equipment check the cylinder 4 injector.
Symptoms you may notice3
- The Check engine (malfunction) lamp comes on or behaves abnormally
- Text message and warning symbol in the display
- Poor performance, the car lacks power
What the fault can affect2
- Engine output and speed may be limited
- Soot particles are not burned off as normal
General guidance for car owners. Diagnosis on the car can point to a different cause.