Hey Guys
Has anyone ever experience the error code P1805? From googling it seems its the Brake Light Switch under the brake pedal. The strange thing is that it paired with my throttle position sensor error caused by a leak in one of my vacuum lines. I have solved that problem now but cant seem to solve the P1805 ?
Error Code P1805
- JTEC
- Senior Member
- Posts: 172
- Joined: 04 May 2019 14:08
- Full Name: Jade Dafel
- Nickname: JTEC
- Home Town: Somerset West
- Current 4x4: 94 GQ Patrol TD42
- Home Language: English
- Has thanked: 164 times
- Been thanked: 64 times
Re: Error Code P1805
So an update on this. I managed to replace the brake light switch with a generic part from Midas for about R70.
The OEM nissan one looks something like this.
The generic one looks like this
Its a straight swop, the only difference is there is no plug housing on the generic and the female plug from the harness just slots over into place.
Something I want to point out, when I connected the new one and took it for a test drive the car felt terribly down on power and struggled to accelerate. I noticed that the brake lamps were still on without the brakes applied so I needed to adjusted the switch to the correct position so that it was not activated when no brakes were applied. Test driving after, the power was back to normal and accelerated as it should. This proves that the 4.8 auto ecu reduces the engine power when brakes are applied, something I had read about but wasn't sure.
The OEM nissan one looks something like this.
The generic one looks like this
Its a straight swop, the only difference is there is no plug housing on the generic and the female plug from the harness just slots over into place.
Something I want to point out, when I connected the new one and took it for a test drive the car felt terribly down on power and struggled to accelerate. I noticed that the brake lamps were still on without the brakes applied so I needed to adjusted the switch to the correct position so that it was not activated when no brakes were applied. Test driving after, the power was back to normal and accelerated as it should. This proves that the 4.8 auto ecu reduces the engine power when brakes are applied, something I had read about but wasn't sure.
- Tinus lotz
- Moderator
- Posts: 7579
- Joined: 29 Aug 2010 13:07
- Full Name: Tinus lotz
- Nickname: Tinus lotz
- Home Town: Centurion
- Current 4x4: Nissan patrol 4.8 GRX 2005
Toyota 2.7 legend 35 LWB 4X4 - Home Language: Afrikaans
- Has thanked: 800 times
- Been thanked: 549 times
Re: Error Code P1805
Jip had the same issue after 3 pirate switches i paid 250 for the nissan one and i was sorted . I by passed it in moz and drove home like that ...not lekke if power doesn't get less
- JohnBoyZA
- Site Admin
- Posts: 1339
- Joined: 02 Apr 2009 14:34
- Full Name: John Murray
- Nickname: John Boy
- Home Town: Bloubergstrand
- Current 4x4: Patrol GRX 4.8
- Home Language: Afrikaans/English
- Location: Big Bay, Cape Town
- Has thanked: 1046 times
- Been thanked: 230 times
Who is online
Users browsing this forum: No registered users and 14 guests