VOLVO
ECM-263A - Long-term fuel trim, load. Upper limit
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS40 (2004–2013), V50 (2004–2013)
Show models by year and engine (2)
What does this fault code mean?
At part load the engine control module (ECM) adjusts the fuel quantity based on the oxygen sensor, and the long-term correction should sit in the middle of its range. When it nearly reaches its upper limit in both the low and high part-load ranges, meaning the mixture is too lean, the code is set.
Possible causes
- Ethanol content in the fuel is too high
- Leakage in the exhaust system draws in air
- Fuel pressure is too low
- The oxygen sensor is damaged
What you can do
- 1Think about whether the car has recently been refuelled with the wrong fuel, and only fill it with petrol as the car's instructions specify
- 2If you are unsure what fuel is in the tank, have a workshop measure its ethanol content
- 3Look for leaks in the exhaust system, especially at the joints, and have a workshop check the fuel pressure
- 4Have a workshop replace the oxygen sensor if the fault remains after these checks
Symptoms you may notice1
- Malfunction indicator lamp (MIL) on
General guidance for car owners. Diagnosis on the car can point to a different cause.