Bosch 0281010293 from a Jeep Grand Cherokee 2.7 CRD: Ticking Over, Not Revving, Repaired

This diesel Jeep Grand Cherokee 2.7 CRD would start and tick over, but it gave no response to the throttle. Its Bosch engine ECU, number 0281010293, was sent in to us, and our test rig found the fault inside the unit: it was not accepting any response from the throttle position sensor (TPS).

We replaced the faulty component and reworked dry joints. The unit then passed its final test on the rig and was sent back to the customer.

It started, it idled, and it ignored the throttle

The customer described the car plainly: it started OK, but there was no throttle response. It ran but would not rev, and just ticked over.

Those few words separate two things that are easy to run together. Starting and idling showed that the engine could run. What it would not do was answer the throttle, and that narrower complaint is the one this job had to explain.

A new throttle position sensor came first

Before the unit reached us, a dealership replaced the throttle position sensor. After that, the dealership diagnosed a faulty engine ECU.

The order is worth keeping in view. With a new sensor fitted, the car still gave no throttle response, so the question moved from the sensor itself to the ECU’s side of that signal. That lesson belongs to this job; it is not a claim that another Grand Cherokee with the same symptom has the same fault.

The customer then sent the unit in for testing and repair. Wherever in the UK a car is, its engine ECU can be posted to our workshop on its own, where it is logged, visually inspected and tested electrically before diagnostics aimed at the fault reported.

What the test rig showed with the unit out of the car

Our bespoke test rig simulates the ECU running on the vehicle, so a unit that has left the car can still be tested as if it were fitted.

On the rig, we identified the fault within the ECU itself: it was not accepting any response from the TPS.

Our findings go to the customer first, and chargeable work begins only with their agreement.

The faulty component, and the dry joints

The repair was made at component level. We replaced the faulty component and reworked dry joints, with the work done under a microscope using temperature-controlled rework equipment.

The unit then passed the final test on the rig. A repair is not complete here until it passes final testing, and only then did the ECU go back to the customer. What we repaired on it carries a 24-month warranty.

The record stops at the unit’s return. It says nothing about how the car drove once the ECU was refitted, so this page does not either.

Matching a unit to Bosch 0281010293

Bosch number 0281010293 is on record from the Jeep Grand Cherokee 2.7 CRD. It may also be printed with spaces, as 0281 010 293. Our job record has this unit down as a Bosch EDC15C5 engine ECU, and 0281010293 has a row in the table on that page.

A Chrysler (Mopar) number may appear with it, beginning 56044356. Both the AB and the AC endings are on record alongside this Bosch number, and our table prints P56044 356AC beside it. With the Mopar ending varying between records, the Bosch number is the steadier reference when matching a unit.

To request a quote, use our Repair Form to set out the symptoms and anything already replaced, along with the Bosch number read from the unit.

For other engine ECUs, look through every engine ECU type on our repair list, or start at the front page of our engine ECU repairs.