Tag Archives: diagnostic

A Few Simple Steps To Find What Was Causing Fault Code P006A On This Ford Ranger.

This Ford Ranger came into the garage with its EML (engine management light) on and in limp home mode for us to diagnose.

First we carried out a full diagnostic scan of its control modules to see what fault codes were stored.

The first code that we were interested in was P006A – Correlation between MAF (mass air flow) and MAP (manifold absolute pressure) sensors.

We checked the live data to see if the sensors were giving any readings and if they were did they seem right?

Both sensors were reading but the MAP sensors seemed a bit low compared to the MAF sensor.

Next we checked for any obvious splits or leaks in the intake and boost pipes between these sensors.

Once we were happy with the pipework we decided to carry out a smoke test on the intake system to check for leaks we could not see.

Disconnect the pipe to the inlet manifold and fit a blanking plug, then fit the smoke tester end to the pipe from the air box.

It soon became apparent there was a leak from the intercooler as we could see smoke coming from the fins at the front of the cooler.

Ford Ranger Air Leak?

After removing the top cover and looking between the intercooler and the radiator we could see the large split in the intercooler bellowing smoke out.

We needed to remove the front grill and slide the front bumper forward to access the bolts to remove the intercooler.

When the intercooler was removed we could see quite clearly that the cooler had split wide open.

We replaced the cooler, re-checked the live data and finally road tested the Ranger and it was back to full power.

Watch the video below to see how bad it was!

Aarons Autos car service garage.

Your friendly car garage in Derby

Give us a call at Aarons Autos for more info.

Peugeot Boxer Timing Chain Noise

This Peugeot Boxer had a serious engine noise and an engine management light on when it came to us for Service.

Firstly we had to diagnose whether it was from the engine internals or auxiliary items such as air con compressor water pump etc.

Once we had determined it was indeed from the engine we needed to strip down to find out what was causing the noise

After removing the timing chain cover it became pretty obvious what was causing the noise, the chain had stretched so much that the adjuster was fully out and the chain was still loose.

Peugeot Boxer Timing Chain Stretched

After removing the chain we compared it to the new chain and it was a full link longer, the teeth on the crank gear had become rounded and all the chain guides were starting to break apart (debris in the sump).

When we fitted the timing tool to the engine prior to removing the chain we could see that the stretched chain had allowed the timing of the engine to be out by a full tooth.

With the new timing chain kit fitted to the engine and all debris removed we treated the engine to a new oil filter and some fresh oil and gave the key a turn.

The difference was night and day, the engine ran smooth with no worrying clattering and rattling just ticking over like it should.

A quick code scan with our diagnostic machine tells us that all the fault codes relating to the stretched timing chain have gone.

Time for a good road test, final check and hand back to the customer.

Aarons Autos car service garage.

Your friendly car garage in Derby

Give us a call at Aarons Autos for more info.