P0470 OBD-II Trouble Code: Exhaust Pressure Sensor Malfunction

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0470 code

P0470 is a diagnostic trouble code (DTC) for "Exhaust Pressure Sensor Malfunction". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
SCHEDULE P0470 DIAGNOSTIC Get a fair and transparent estimate upfront

P0470 code definition

P0470 is a code that means the sensor in charge of assessing exhaust pressure isn’t working properly.

What the P0470 code means

This code means that the signal being provided by the exhaust pressure sensor isn’t matching the ambient air pressure or manifold pressure. It’s associated with code P0471. The only difference between the two is how long the problem has persisted for the electrical/mechanical problem the vehicle is having.

What causes the P0470 code?

There are five main issues that could be behind a P0470 code:

  • The exhaust back pressure sensor is faulty
  • The exhaust back pressure sensor harness is shorted or completely open
  • There is a poor electrical connection with the exhaust back pressure sensor circuit
  • The tube that runs from the pressure sensor to the exhaust manifold is blocked
  • The PCM may have failed (extremely unlikely)

What are the symptoms of the P0470 code?

The Check Engine Light usually comes on if this code is present. You’ll most likely also feel a lack of power from your engine.

Manual regeneration will be impossible. Eventually, the problem may evolve into a crank-no start too.

How does a mechanic diagnose the P0470 code?

Given how often it’s involved with a code P0470, the first thing a mechanic will do is check the exhaust back pressure sensor when looking to diagnose the underlying problem.

Then they’ll disconnect the tube that connects the exhaust manifold to the exhaust pressure sensor and attempt to run air through it. If that proves impossible, they can use a wire to dislodge whatever may be causing the blockage.

Next, the mechanic will check the wiring involved for signs that it has been compromised. The connectors will also need to be similarly inspected.

The harness that runs to the exhaust pressure sensor can also be disconnected so that the power supply circuit can be tested to ensure it is working properly.

If nothing else seems to work, the issue is most likely that the exhaust pressure sensor is simply malfunctioning.

Common mistakes when diagnosing the P0470 code

The most common problem is just not giving the back pressure sensor the attention it deserves when diagnosing the problem. More often than not, that’s where you’ll find the problem, so start there and check everything before moving on or you may waste a lot of time only to return to the sensor or, even worse, misdiagnosing the problem completely.

How serious is the P0470 code?

The longer the P0470 lasts for, the longer you’re going to be driving a vehicle that isn’t reaching its potential in terms of performance and power. Keep in mind, though, that the sensor could simply be malfunctioning which means it just needs to be replaced but everything else is working fine.

What repairs can fix the P0470 code?

  • As we covered above, the big one is replacing the back pressure sensor. Usually, this is enough to make the code disappear.

  • Otherwise, the sensor and its associated circuits will need to be tested to make sure the former isn’t malfunctioning because of the latter.

  • The power supply for the sensor will also be tested to confirm that’s not the reason why it’s not working correctly.

  • The power supply to the exhaust pressure sensor should also be gauged.

Additional comments for consideration regarding the P0470 code

Usually, this is a pretty quick fix if one of the above issues is to blame. While the symptoms may not seem especially dire, this is still something you should have diagnosed. If the problem causing the P0470 code isn’t one of the above, something far worse could be in the works.

Need help with a P0470 code?

If your vehicle is currently suffering from a problem related to P0470, YourMechanic is ready to help. You can reach one of our service advisors at 1-800-701-6230 or schedule an appointment online. Certified mobile mechanics are standing by and can meet you at your home or office to assess and repair your vehicle. We’ll be sure to give you a free quote before we send them out too.

Check Engine Light
trouble codes
P0470

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0470 code.

SCHEDULE P0470 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0343 OBD-II Trouble Code: Camshaft Position Sensor Circuit High Input
P0343 means theres a problem with the camshaft position sensor which has usually been fouled from oil and moisture causing a bad ground or voltage.
P0372 OBD-II Trouble Code: Timing Reference High Resolution Signal A Too Few Pulses
P0372 code means less pulses than normal have been detected on the sensor disk on the injection pump due to faulty crankshaft or crankshaft sensor.
B1955 OBD-II Trouble Code: Seat Front Up/Down Potentiometer Feedback Circuit Open
B1955 means there is a circuit failure related to one of the front seat's potentiometers, likely due to a faulty potentiometer or bad wiring.

Related questions

Car stalled at take off, wrench symbol popped up, no response when gas pedal pushed but Rpms moved, after turn off/on it fine
The wrench symbol is a Check Engine or Service Interval Light. Without additional information it is tough to say what this could be, however some common items that could cause this to happen may be, a faulty mass airflow sensor...
Check Engine Light does not come on even though there are trouble codes present
The pink/light green wire in ECM pin 2 on the connector will ground the wire internally to the ECM to turn on the Check Engine Light. You could test the wire with the key on and it should have battery...
Why would my car lose power and jump down while driving and the epc and check engine light come on in my 2002 Volkswagen Jetta
Hello. Since the check engine light is on the best thing to do first would be to scan the computer for codes. This would need to be done first to see what the computer is seeing as the issue. It...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com