With the p1590? Its not an emmisions code, can I pass?

 

Pretty sure they plug in and if there are codes then it will have issues. Its free so mind as well just go in and try.

 

as long as there is no SES light on and the sensors are in ready mode you should pass.

 

you should be able to clear the code and it should stay as a soft error. The only time I had it come as a hard error was when another code came with it. I passed 3 times with a 1590 soft code.

 

Depends on the rules.. In PA, you can have 1 or 2 codes that do not relate to each other and still pass. as long as they read active. If the codes indicate a fail on the system then all bets are off. But thats PA.

 

quit beating up your D2!

Engine Code: p1590

Land Rover Engine Code: P1590 = ABS rough road signal circuit malfunction Hardware is OK, but SLABS ECU is sending an error signal. DTC P1590-P1592: ABS - ROUGH ROAD SIGNAL CIRCUIT MALFUNCTION Description When the vehicle travels across rough terrain, or on rough roads the ECM could falsely interpret suspension vibrations as a misfire and invoke engine misfire protocols and/or set a false DTC. The Self-Leveling and Anti-Lock Brake System (SLABS) ECU sends a rough road PWM signal to the ECM. Based on this rough road PWM signal, the ECM can suspend misfire detection for as long as the vehicle is travelling on a rough road. Rough road signal input is measured at ECM 40-pin connector C0637 terminal No. 34 (Red/Green wire on Discovery; Yellow/Pink wire on Range Rover). The SLABS ECU rough road PWM signal varies in accordance with changing road conditions. The rough road PWM signal operates at a frequency of 2.10-2.56 Hz. ECM rough road control is based on specific changes to the PWM signal. If there is a rough road PWM signal failure the Hill Descent Control/Anti-Lock Braking System (HDC/ABS) warning light may be illuminated. Diagnostic Aids The rough road PWM signal can fail in the following ways: Harness or connector damage. SLABS wheel speed sensor failure. If there is a rough road signal malfunction, the following DTCs may be set: If DTC P1590 is set, there is an ABS rough road signal circuit malfunction. Hardware is okay, but the SLABS ECU is sending an error signal. If DTC P1591 is set, there is a low ABS rough road signal circuit. Signal from SLABS ECU is shorted to ground. If DTC P1592 is set, there is a high ABS rough road signal circuit. Signal from SLABS ECU shorted circuit to battery voltage. Diagnosis & Repair When ignition is turned on and during vehicle operation, ECM checks rough road signal circuits. If expected signal is not seen, ECM will store a DTC. Using an oscilloscope or Snap-On(R) PAC ensure SLABS ECU PWM signal indications are consistent with road conditions. See ROUGH ROAD PWM SIGNAL INDICATIONS table. If PWM signal is not as specified, check circuits for opens or shorts. Check for poor power and ground connections and/or loose wires at ECM. See WIRING DIAGRAMS article. Ensure ABS wheel speed sensors are operating properly. Repair as necessary. When DTC P1590-P1592 repairs are completed, perform REPAIR CONFIRMATION DRIVE CYCLE "A" .

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@Jfall have you ever tried to solve a 1590? it's the most difficult thing to fix on these trucks. i had no luck, my indie guy had no luck, the dealer had no luck, no one could solve it. we had tested everything had wiring looms protected so they couldnt short. you name it... not saying it's not worth a shot trying to solve it, but god bless those who have to.

 

My p1590 came on during an exciting up and down whoopie section in the woods so it makes sense that nothing is really wrong.

 

I dont have the SES on so its not a hard code, monitors should be ready at this point since my last reset.

 

If you have a 1590 and you are doing a saftey inspection, I doubt that anything related to a brake issue will pass.
Even though your 3 lights are not on, but you have a 1590, it is safe to say they will be back, so get ready for them.