P1790 Mazda Code - Throttle Position Sensor Malfunction
Quick Answer
P1790 Mazda indicates Throttle Position Sensor Malfunction. Common causes include Faulty Throttle Position (TP) Sensor, Throttle Position (TP) Sensor harness is open or shorted, Throttle Position (TP) Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1790 Mazda indicates Throttle Position Sensor Malfunction.
- Common causes
- Common causes include Faulty Throttle Position (TP) Sensor, Throttle Position (TP) Sensor harness is open or shorted, Throttle Position (TP) Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1790 Mazda Description
What are the Possible Causes of the DTC P1790 Mazda?
- Faulty Throttle Position (TP) Sensor
- Throttle Position (TP) Sensor harness is open or shorted
- Throttle Position (TP) Sensor circuit poor electrical connection
How to Fix the DTC P1790 Mazda?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1790 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1790 Mazda Code
1. What does the OBDII code P1790 mean on a Mazda?
P1790 in a Mazda indicates a Throttle Position Sensor (TPS) malfunction, which means the sensor is not providing accurate throttle position data to the vehicle's computer.
2. What are the common symptoms of a P1790 code in a Mazda?
Symptoms may include poor acceleration, stalling, rough idling, reduced fuel efficiency, or the vehicle going into "limp mode."
3. What causes the P1790 code to appear on a Mazda?
Common causes include a faulty Throttle Position Sensor, damaged wiring or connectors, or issues with the vehicle's Powertrain Control Module (PCM).
4. Can I drive my Mazda with a P1790 code?
Driving with this code is not recommended, as it can lead to unpredictable throttle response and potential safety concerns.
5. How do I fix the P1790 code on a Mazda?
Fixes include inspecting and replacing the TPS if necessary, repairing damaged wiring or connectors, and clearing the code with an OBDII scanner after repairs.
6. How can I test the Throttle Position Sensor on my Mazda?
You can test the TPS using a multimeter to check for proper voltage readings as the throttle opens and closes. Consult your vehicle's service manual for specific specifications.
7. Is a faulty throttle body linked to the P1790 code on a Mazda?
Yes, issues with the throttle body, such as carbon buildup or mechanical failure, can affect TPS performance and trigger the code.
8. Will clearing the P1790 code fix the problem on my Mazda?
Clearing the code without addressing the underlying issue will only temporarily remove it, and the code will likely return.
9. How much does it cost to repair a P1790 code on a Mazda?
Costs vary, but replacing the TPS typically ranges from $100 to $300, including parts and labor. Wiring repairs or PCM issues may increase costs.
10. Can low battery voltage trigger a P1790 code in a Mazda?
Yes, low or inconsistent battery voltage can affect the TPS and cause communication errors, potentially triggering the code.
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