A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Engine control unit Alfa Romeo 159 2.2 JTS Bosch 0261S01066 00518301020
Vendors's code: 0261S01066
Product code: 00518301020
Barcode:
Code 39:
ISBN:
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Where is the number 0261S01066 on the control unit housing?
Used, working Bosch engine control unit 0261S01066 (number 00518301020) for petrol engines, for Alfa Romeo 159 2.2 JTS. Match it by the numbers on the housing – the unit is in the Plug & Play version, ready for programming.
Engine control unit 0261S01066 – Alfa Romeo 159 2.2 JTS
When the engine control unit stops working, the car usually has starting or running problems. A used, working Bosch unit 0261S01066 (00518301020) for the 2.2 JTS petrol engine is one way to restore proper operation in the Alfa Romeo 159.
Part numbers to compare
- 0 261 S01 066 / 0261S01066 – Manufacturer part number (Bosch)
- 00518301020 – OEM number on the housing
The label usually shows the manufacturer’s number and the OEM number. If one of them is 0261S01066 or 00518301020, the part is the right one; send us a photo of the label if in doubt.
When does an engine control unit start causing trouble?
Typical symptoms are hard or no starting, an engine warning light, limp mode, no communication with diagnostics and ignition or injection system errors. Before replacing the unit, check the power supply, grounds, fuses and wiring – the control unit is not always the cause.
Plug & Play version, ready for programming
We offer this control unit in the Plug & Play version, ready to be programmed to your car. More about unit versions: engine ECU preparation options.
Questions about this control unit
| Is 0261S01066 the same as 00518301020? | They are two numbers of the same part: 0261S01066 was assigned by the manufacturer (Bosch), while 00518301020 is the OEM number from the housing. One of them is enough for comparison. |
| Does the control unit need programming after replacement? | Yes – the unit works together with the immobiliser and the vehicle, so it must be programmed before the engine is started. This unit is ready for programming. |
| Is this control unit new? | No, it is a used part removed from a vehicle, working and in good condition. |
Questions, or want to confirm the fit? Write to contact@auto24parts.com. See also: all engine control units.