If you see “Service Electronic Throttle Control” on your Ram 1500, it means your throttle system isn’t working right. This could lead to sudden acceleration or slow response, which is dangerous.
In this guide I’ll tell you how to fix it quickly to stay safe on the road.
What Causes Ram 1500 Service Electronic Throttle Control Issue?
Ram 1500 Service Electronic Throttle Control message is caused by one of these parts being problematic: TRSC module, turbo overboost, accelerator pedal sensor, timing chain, throttle body or TPS, or grounding and connectors.
Let’s learn more about these before moving into the fixes:
1. Trailer Reverse Steering Control Module Glitch
The TRSC module in the Ram 1500 helps with backing up trailers using sensors. If there’s a software glitch, it sends wrong data. This affects systems like the backup camera and parking sensors.
The Engine Control Module (ECM) sees the bad data and shows the “Service Electronic Throttle Control” warning. It does this because it can’t trust the incorrect signals and tries to keep things safe by reducing throttle control.
2. Turbo Overboost and Limp Mode
The turbocharger in the Ram 1500 boosts engine power by forcing more air in. When towing heavy loads uphill, the turbo can create too much boost, called overboost.
The ECM detects this with the Manifold Absolute Pressure (MAP) sensor. To protect the engine, it switches to limp mode, cutting power and limiting throttle response. This triggers the “Service Electronic Throttle Control” warning.
You might notice less acceleration because the ECM is controlling the engine load to avoid damage.
3. Accelerator Pedal Sensor Malfunction
The Ram 1500 uses a drive-by-wire system, where the accelerator pedal position sensor (APPS) sends signals to the ECM. If the sensor malfunctions, it sends wrong signals, causing the throttle to act unpredictably.
The ECM needs accurate data to manage the engine, so it shows the “Service Electronic Throttle Control” warning when it gets inconsistent signals. This usually happens because of sensor wear, leading the ECM to adjust throttle response for safety.
4. Timing Chain and Engine Damage
The timing chain in the Ram 1500 keeps the crankshaft and camshaft in sync, making sure valves open and close at the right time. If the chain breaks, this balance is lost, causing serious engine damage like bent valves and rods.
The ECM detects performance issues and triggers the “Service Electronic Throttle Control” warning.
Some models also have tone wheel delamination, affecting the crankshaft position sensor. Bad signals lead to misfires and poor performance, prompting the warning.
5. Dirty Throttle Body or Faulty TPS
The throttle body in the Ram 1500 controls air entering the engine, which is important for the right air-fuel mix. Dirt and carbon can clog it, reducing airflow. The Throttle Position Sensor (TPS) tells the ECM about the throttle valve position.
If it malfunctions, the ECM gets bad data, leading to erratic throttle responses. It triggers the “Service Electronic Throttle Control” warning.
You may experience stalling and rough idling due to the ECM trying to manage the engine with the wrong info. In some cases, the throttle body might be done for, entirely.
6. Grounding Issues and Loose Connectors
The Ram 1500’s electrical systems need good connections and proper grounding. Loose connectors, especially under the fuse block, disrupt power and data flow to sensors, causing electrical problems.
The ECM might see these as faults, triggering warnings like “Service Shifter” or “Service Transmission” It limits vehicle functions, leading to the “Service Electronic Throttle Control” warning as well.
Secure connections make sure the ECM gets accurate data, preventing unnecessary alerts.
How To Fix Electronic Throttle Control In Ram 1500?
To fix Electronic Throttle Control issues, check and secure grounds and wiring, reset the TRSC module, replace the turbo if necessary, install a new accelerator pedal if faulty, clean or replace the throttle body, and check for a recall if your truck is a 2014-2018 3.0L Diesel model.
For starters, check your grounds, and look at your truck’s wiring diagram. See if all the wires are okay and not burnt or torn.
1. Reset Trailer Reverse Steering Control Module
- Open the interior fuse panel.
- Locate fuse #53.
- Pull fuse #53 out of the panel.
- Wait for 10 seconds.
- Reinstall fuse #53 into the panel.
- Close the interior fuse panel.
2. Replace The Turbo
These are the steps for Ram EcoDiesels. Keep in mind that turbo replacement can be expensive, you’ll have to pay over $2k. So, keep this one as a last resort.
- Remove the transmission and transfer case.
- Drain the DEF tank if needed.
- Remove the starter to access the torque converter bolts.
- Remove the transmission oil cooler and wiring harnesses.
- Replace the crankshaft sensor and reluctor wheel if their history is unknown.
- Disconnect the turbocharger coolant and oil feed lines.
- Remove the old turbocharger; cut broken studs if necessary.
- Install the new turbocharger with new gaskets and copper washers.
- Reconnect the coolant and oil feed lines, ensuring proper torque.
- Reinstall the intake manifold and any removed components.
- Reassemble the transmission and transfer case.
- Tighten any loose connections and fittings.
- Pressure test the cooling system for leaks.
- Test drive the truck to ensure proper operation and check for leaks.
3. Get A New Accelerator Pedal
You’ll need to replace the whole pedal if it’s the sensor. A lot of users have been able to fix the issue this way, so you should give it a try:
- Locate the accelerator pedal and sensor assembly.
- Remove panels blocking access to the assembly.
- Disconnect the negative battery terminal.
- Unbolt the pedal assembly.
- Disconnect the sensor plug.
- Remove the old pedal and sensor assembly.
- Install the new pedal and sensor assembly.
- Reconnect the sensor plug.
- Secure the pedal assembly with bolts.
- Reconnect the battery terminal, reassemble panels, and test the pedal.
4. Clean The Throttle Body
Just cleaning should be enough. If you still notice the symptoms, the TPS might be completely broken. In that case, you might have to replace the Throttle Body.
- Disconnect the negative battery terminal with a 10 mm wrench.
- Open the air box by releasing the metal clips and disconnect the hose.
- Loosen the rear inlet pipe clamp with a flat-blade screwdriver and remove the pipe.
- Lift and remove the bottom half of the air box.
- Remove the two 10 mm bolts behind the alternator and oil cap.
- Disconnect the intake air temperature sensor.
- Spray throttle body cleaner into the throttle body.
- Clean the throttle body with a brush and wipe with a rag.
- Wipe out debris and ensure no residue falls into the intake.
- Reassemble the air box, reconnect the battery, and start the vehicle.
How Much Does It Cost To Fix The Electronic Throttle Control On A Ram 1500?
Fixing the Electronic Throttle Control on a Ram 1500 can cost between $150 and $300 for minor issues like a faulty throttle position sensor. If the throttle body needs replacement, it may cost between $500 and $800. Replacing the turbocharger, if needed, can cost between $1,000 and $3,000.
Actual costs depend on diagnostic fees, parts, and labor rates at the repair shop.
How To Reset Electronic Throttle Control On Dodge Ram 1500?
To reset the ETC, you need to reset the throttle position sensor, which will cause the truck to recalibrate:
- Turn the key to “on” without starting the engine.
- Wait for the warning lights to go off. The check engine light may stay on.
- Press the accelerator to the floor slowly.
- Release the accelerator slowly until it’s back up.
- Turn the key to “off” and then “on” again.
- Start the engine.
FAQs
Can you drive with service electronic throttle control message on dashboard?
Yes, you can drive with the “Service Electronic Throttle Control” message, but it’s risky. The warning means throttle issues could cause reduced power, erratic acceleration, or stalling. Driving with this message can lead to breakdowns or unsafe conditions. It’s best to get it checked soon.
Was there ever a recall made for Ram 1500 Service electronic throttle control issue?
Yes, there was a recall for an issue that brought up the “Service electronic throttle control message”. If your truck was built between 2014-2018 with a 3.0L Diesel engine, it might be a build defect. So if you haven’t had yours taken care of by a dealership you should give that a go now.
Final Thoughts
A messed up ETC can cause your engine to behave all over the place, with surges or drops in power. You don’t want to drive a truck that feels unpredictable.
Not to mention, there will probably be a lot of distracting clicking and whining noises.
Get those ETC issues sorted out to keep your engine steady and reliable. Don’t worry, you’re not that likely to need the $2k+ fix. The others will do perfectly fine.
