P1520 Isuzu Code - Commanded Versus Actual Throttle Position Correlation Small Stop Open
Quick Answer
P1520 Isuzu indicates Commanded Versus Actual Throttle Position Correlation Small Stop Open. Common causes include Faulty Throttle Valve Motor, Throttle Valve Motor harness is open or shorted, Throttle Valve Motor 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
- P1520 Isuzu indicates Commanded Versus Actual Throttle Position Correlation Small Stop Open.
- Common causes
- Common causes include Faulty Throttle Valve Motor, Throttle Valve Motor harness is open or shorted, Throttle Valve Motor 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 P1520 Isuzu Description
What are the Possible Causes of the DTC P1520 Isuzu?
- Faulty Throttle Valve Motor
- Throttle Valve Motor harness is open or shorted
- Throttle Valve Motor circuit poor electrical connection
How to Fix the DTC P1520 Isuzu?
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 P1520 Isuzu 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 P1520 Isuzu Code
1. What are the common symptoms of OBDII code P1520 in an Isuzu vehicle?
The common symptoms of P1520 include rough idle, poor acceleration, engine stalling, and the Check Engine Light being illuminated.
2. What does the OBDII code P1520 "Commanded Versus Actual Throttle Position Correlation Small Stop Open" mean for an Isuzu?
P1520 indicates a discrepancy between the commanded throttle position by the vehicle's computer and the actual position of the throttle.
3. What are the possible causes of OBDII code P1520 in an Isuzu?
Possible causes of P1520 include a faulty throttle position sensor, problems with the throttle body, wiring issues, or a malfunctioning electronic control module (ECM).
4. How can I diagnose the OBDII code P1520 in my Isuzu?
Diagnosing P1520 typically involves checking the throttle position sensor for proper operation, inspecting the throttle body for any obstruction or damage, and testing the wiring connections for continuity.
5. Can I continue driving my Isuzu with the OBDII code P1520 present?
It is not recommended to drive your Isuzu with the P1520 code active, as it can lead to reduced performance, potential engine damage, and safety hazards.
6. How can I repair OBDII code P1520 in my Isuzu?
Repairing P1520 may involve replacing the throttle position sensor, cleaning or replacing the throttle body, repairing any damaged wiring, or resetting the ECM.
7. Is it possible to reset the OBDII code P1520 in an Isuzu without fixing the underlying issue?
While you can clear the code using an OBDII scanner, it is important to address the root cause of P1520 to prevent the issue from reoccurring.
8. How much does it cost to repair OBDII code P1520 in an Isuzu?
The cost of repairing P1520 can vary depending on the specific cause of the issue, but it may range from $100 to $500 or more, including parts and labor.
9. Can a DIY enthusiast fix the OBDII code P1520 in an Isuzu?
Depending on the skill level and tools available, some DIY enthusiasts may be able to address P1520 by following repair guides and using caution when working with sensitive electronic components.
10. How urgent is it to address the OBDII code P1520 in an Isuzu?
It is recommended to address P1520 promptly to prevent further damage to the engine, ensure optimal vehicle performance, and maintain safety on the road.
Discuss the causes and fixes for P1520 Isuzu OBDII Code
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P1520 Electronic throttle system-supply voltage [power stage currentless[.
This KB 300, 4JH1 eng only has a tps and not a motor on the throttle body. The diesel pump is drive by wire and I supect the problem will lie in the pump. Will check relevant wiring and connectors first.
Fault cannot be erased with scanner.
Any suggestions will help? -
Unfortunately I don't have the manual for your vehicle, but I found this information online for your vehicle that may help you:
"The neutral switch is installed on the transmission gear control box. When the gear position is neutral, the switch is closed and the switch signal is provided to the engine control module (ECM). If the ECM detects the neutral switch signal is not changed from other than neutral during the predetermined engine speed and vehicle speed range, this DTC will set. This DTC runs only manual transmission."
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Hi, did you ever find the solution to your problem? Im currently facing the same issue. Any help would be greatly appreciated!
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Hi, I would really appreciate if you could guide me towards the correct direction. I fixed the neutral switch but it seems the error still cannot be erased. What exactly is causing this problem?
Your response is greatly appreciated.
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Hi there,
It's an Isuzu Dmax 4JH1-TC.
Currently having the exact same problem as mentioned by Willie above.
Fault code is P1520, I've checked on the neutral switch, it was in fact broken, changed it and repaired the wires, seems like neutral switch is working. (I use G-scan 2)
However, the fault code is still present and cannot be erased. I don't understand where the 'electronic throttle system' is, this model only has an accelerator position sensor, mechanical throttle, not electrical.
P1520 [Electronic Throttle System (ETS) - Supply Voltage] / [Power stage Currentless]
Thank you so much for your reply.
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I found a video that explain how to reset the system. You have to disconnect the switch connector and use a wire to jump the connector, then you have to drive your vehicle for 10 minutes above 60 kmh, then reconnect the connector.
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Hi, thank you so much for the reply!
I am sorry but I do not understand what the video is saying. Do you mean disconnect the neutral switch connector? And jump the wires from the wire harness side right?
The drive around for 10 minutes above 60km/h, then connect back the wires and delete fault code, it should reset?
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Do you mean disconnect the neutral switch connector? And jump the wires from the wire harness side right?
The drive around for 10 minutes above 60km/h, then connect back the wires and delete fault code, it should reset?Yes, that is correct.
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Thank you very much my friend, I will try and get back to you here! Hopefully it works ? I will update you again.
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Hi,
So I tried what was stated in the video, but couldn't solve it.
It didnt work for me, would you have any other suggestions?
Regards.
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Good day, cannot remember! If you are convinced the Park neutral switch wiring is OK and the setting was done on test drive then I will double check the engine current data with a scanner. Is the light just on and the vehicle performs?
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Hi there Willie,
Thank you very much for your reply! Yes I'm very sure the wires are ok, and I've tried the setting, current data seems fine too, nothing seems strange or out of the way, car performs like normal. Just engine check light is on, I don't know if my setting wasn't done correctly, maybe I need to drive longer? But I think in a case like this, probably flashing ECU and deleting fault code would be easier :/ Would you have any other suggestions for me?
Regards.
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