Toyota Vitz Engine Stalling - P1603 Error Code

[rkbladex]

Happened to my vitz 2 weeks back when I poured two tanks of hobc. Nothing to worry. Use 2 tanks of super and then afterwards mix hobc with super, issue will be gone. My long selfs have decreased almost 90% using this technique, not 100% ok though

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Thx for the update. Do you know what is the issue with HOBC with long self? what is the relation between them? is there any issue with ignition timing or something else?

• RKBladeX

[m_umairr]

Thx for the update. Do you know what is the issue with HOBC with long self? what is the relation between them? is there any issue with ignition timing or something else?

- RKBladeX

No, I don't know about the linkage.
A saw one of the PW members suggest it on some older post.
But my long self issue is still there. I have used almost 4 tanks of regular fuel and 2 of mixed one.. of no use.
I fear it has something to do with the Fuel pump..

[sajawal.thestud3]

Just to update you guys My car engine don't stalling now on low RPM or Speed during AC operation. I don't have done anything except one which is pouring Full Tank High Octane. So Now i realize this issue is related to Fuel. One thing happen when i pour full tank HOBC in my car now my car taking long self on Cold starting in morning or when engine is cold.

Can you guys know what was the issue?

- RKBladeX

I am havivg same issue with my vitz 2005 my engine off on low rpm and on low speed and specially when i switch on my ac . I changed the plugs but it dosnt help . High octane can solve this issue ? Can i get ur num of fb is that we can discuss this on details

[rkbladex]

Yes high Octane will solve this issue. I will PM you my number.

• RKBladeX

[rkbladex]

Yes high Octane will solve this issue. I will PM you my number.

• RKBladeX

[rkbladex]

I am havivg same issue with my vitz 2005 my engine off on low rpm and on low speed and specially when i switch on my ac . I changed the plugs but it dosnt help . High octane can solve this issue ? Can i get ur num of fb is that we can discuss this on details

Do you perform any repair from mechanic to solve this issue?

• RKBladeX

[shadab_lodhi]

Error Code: P1603
Description: Engine stall history.
Solution:
- Check the vacuum leak at the intake manifold.
- Check PCV Valve for open.
- Check the servo booster for leak.
- Check the cylinder compression and valve tappet clearance.
- Redo the throttle body cleaning properly and re-learn it.

[alinawaz83]

The same issue happened with me. I cleaned the throttle body and Calibrate the ECU by using Toyota Tech stream Software. The issue never come back till date

[rkbladex]

The same issue happened with me. I cleaned the throttle body and Calibrate the ECU by using Toyota Tech stream Software. The issue never come back till date

What do you mean by Calibrate the ECU do you mean throttle relearn?

• RKBladeX

[alinawaz83]

After cleaning throttle body, First I relearn, The is still their, then I clear errors codes. After that I switch OFF car and after 10 seconds start it. Then again relearn, the error goes.

[rkbladex]

After cleaning throttle body, First I relearn, The is still their, then I clear errors codes. After that I switch OFF car and after 10 seconds start it. Then again relearn, the error goes.

What fuel do you use in your car like PSO, Shell ...etc. Normal or HOBC...?

• RKBladeX

[alinawaz83]

HOBC from the very first day from Caltex, Now it changed to TOTAL.

[farhanali79]

Following ..........

[Hassan1991]

You're late. Now you will be considered absent.

[rachelgomez161999]

Steps to Fix the P1603 Code
Start by checking the "Possible Causes" and Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Regards,
Rachel Gomez

[rachelgomez161999]

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

This may help you,
Rachel Gomez