Volvo cars equipped with five-cylinder gasoline engines (V70 S60 S80) can suffer from rough idle and stalling problems.

Although not exclusively limited to, the most likely cause of this problem might be a failing Volvo Electronic Throttle Module (ETM).

These cars use a fly-by-wire throttle. The failure is caused by wear in the internal throttle position sensor contacts.

Symptoms of failing ETM

Volvo ETM location

What you might experience:

  • rough and fluctuating idle
  • engine stalling or dying
  • hesitation on accelerations
  • the engine goes into limp mode
  • Illuminated check engine light
  • idle fluctuates between 500 and 1000 RPM
  • error codes 91A7, 9190 or 917F

If experiencing some of these symptoms, it is likely that your Volvo has a bad electronic throttle module. Especially if any of the codes are present.

The problem lays within the throttle position sensor that is integrated into the ETM.

Being a mechanical contact type, it relies on physical contact between two small moving parts. With time, these parts wear out, causing loss of contact. Newer cars don't experience this problem as they have contactless throttle position sensors.

Common Problems

Dirt on Butterfly Valve

dirty volvo etm throttle butterfly valve

Over time dirt and grime can build up inside the throttle body. You can simply remove the intake air hose connecting the throttle body. Then use Throttle Body Cleaner and a clean cloth to remove the dirt.

Remove any loose dirt from the throttle body or it will end up in the cylinders.

As dirt build-up can cause symptoms similar to the failing ETM, checking this should be your first step. Use a cleaner to thoroughly clean the throttle butterfly valve.

Volvo ETM Failure

volvo etm failure repair fix

The Electronic Throttle Module itself can fail. Replacing your ETM with a new one is an obvious and easiest solution but also the most expensive. If done by a dealer you are looking at a $1000+ repair. An alternative solution would be to buy a new Volvo throttle online. Keep in mind it may need to be programmed.

Replacing your ETM with a used one is a much cheaper option. Still, as with any used part, this is always risky. You don't know how long the used part will last plus it may also need programming.

A cost-effective way to fix Volvo ETM is to have a specialist repair your existing unit. You will need to remove it and send it in for repair. As ETM failures are very common, there are a number of specialists that offer Volvo ETM repair service. See the instructions below on how to remove Volvo ETM.

If at all possible ask that your specialists replace the mechanical type TPS with a contactless-type, eliminating potential problems in the future.

volvo Details about  TPS Contactless Throttle Position Sensor for Volvo ETM 99-02 Throttle Body An alternative solution is to buy a contactless Volvo throttle body position sensor repair kit and do the repair yourself. As this can be done within one day, it is much faster than sending the unit to the specialist. And it will save you some money, too. However, it does require quite a bit of skill and patience, as well as some of the more-than-basic tools.

Removal and installation procedure

Whatever the Volvo ETM repair method you choose, the ETM unit will need to be removed from the car. The good news is that there is no need to remove the manifold itself.

  1. Open the hood and disconnect the negative battery cable.disconnect volvo negative battery  before fixing etm module
  2. Remove the intake air pipe that connects to the throttle body. Remove the inlet pipe to the air filter housing if necessary.REMOVE VOLVO ETM
  3. Remove any pipes that go to the throttle body.
  4. Disconnect the ETM connector.
  5. Unbolt 4 bolts that hold the ETM.volvo etm removal
  6. Carefully separate the ETM from the inlet manifold.remove volvo throttle body
  7. Installation is in reverse order of removal. Always use a new ETM gasket.

If you are still experiencing problems after you repair your Volvo ETM module, read the fault codes via the Diagnostic Port located under the dashboard. To get a better understanding of the problem, use a Volvo specific scanner instead of a generic OBD2.

Programming

Whether you have acquired another ETM, or have yours repaired, some programming might be required.

A sticker color can be used as a rule of thumb. Units with white stickers will require programming, also called ETM Reload, after installation.

You will need a Volvo proprietary diagnostic for this.

Otherwise, programming will need to be done by the dealer. If the tag is yellow, all you need to do is to reinstall it.

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Thank you! 

Visitor
Member since 2020-09

Engine runs rough with engine light on. Mine was diagnosed with ETM failure. Replaced with xemodex aftermaket ETM. Runs good now. I have learned that variable resistor potentioneter that measures the butterfly valve position fails.

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Visitor
Member since 2020-09

03 Volvo S60 AWD. Looking for info on sudden ETM failure, on s60AWD with only 113k miles- I'm original owner of my babied car....I've been waiting weeks to have the ETM rebuilt.....Finally my mechanic received the rebuilt part and it still failed....a substitute ETM produced a perfectly running car, but mechanic wants me to get a newly rebuilt one for its warranty. Are these covered under a Volvo recall , or do I have any rebate concerning failure? I need guidance on where to go for help. Thank you in advance! ( I've been without my car for almost three weeks!)

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Visitor
Member since 2020-09

Looking for info on sudden ETM failure, on s60AWD 2003 with only 113k miles- I'm original owner of my babied car....I've been waiting weeks to have the ETM rebuilt.....Finally my mechanic received the rebuilt part and it still failed....a substitute ETM produced a perfectly running car, but mechanic wants me to get a newly rebuilt one for its warranty. Are these covered under a Volvo recall , or do I have any rebate concerning failure? I need guidance on where to go for help. Thank you in advance! ( I've been without my car for almost three weeks!)

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visitor
Member since 2020-06

The picture is not of an ETM (electronic throttle module) but an ETA (electronic throttle assembly).   The ETA is a "dumb" throttle, and has no ECU or electronic functions, it's simply a slave to the engine ECM.  When cleaning these, you need to try to keep cleaning agents away from the shaft end that goes into the area where the throttle position sensors are, as aggressive cleaning agents can get past the seal and take contaminants into the position sensors.  Done improperly it will drastically shorten the life of the throttle.  

 

The ETM was used from 1999-2002 and was a completely different animal.  It has an ECU, is software programmed, and talks on the CAN bus.  There were issues with them, an extended warranty and recall, and they were improved over time.  

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