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11th March 2024, 15:06
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#1 |
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Regular poster
Rover 75 1.8 Connoisseur SE Join Date: Jul 2020
Location: Flanders
Posts: 68
Thanks: 13
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Fault codes - caused by throttle? (1.8)
I've recently had my throttle replaced, but now, after a couple 100 km, the check engine light has come on again.
TOAF reads the following codes: - P1191 - P0445 - P0141 - P0420 Could it be the new throttle is causing these fault codes or do I need to look elsewhere? |
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11th March 2024, 15:51
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#2 |
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I really should get out more.......
Rover 75 connoisseur se v6 auto Join Date: May 2014
Location: Hull
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Not sure how the throttle would cause these code - basically saying the O2 sensors are faulty in turn causing the Cat to throw an error code - also looks like you have a purge valve fault - saying that i had that on my ZT for 7 years without any obvious effect.
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She came off the Longbridge Line on 20-05-2003 The Silver Machine was the 13th of 160 Rover 75's to come off the production line that day and is the 100th of 527 Starlight Silver Rover 75 2.5 V6 Connoisseur SE Auto saloons listed in the build records produced world wide. |
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11th March 2024, 15:56
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#3 |
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This is my second home
Rovers 75 & 25 Join Date: Oct 2010
Location: Wearside
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Looking at the meaning of the codes as listed on this site most of the codes do look to relate to a possible problem with an O2 sensor or the associated circuit. Not sure if PO445 could also be related or maybe something else.
P1191 - Oxygen sensor heater circuit open circuit - downstream sensors Downstream oxygen sensor heater electrical - line break Yes P0445 - Evaporative emission control system purge control valve shortcircuit Purge valve drive - short to ground Yes P0141 - 02 Sensor heater circuit malfunction (bank 1 sensor 2) Downstreamoxygen sensor heater electrical - incorrect reading Yes P0420 - Catalyst system efficiency below threshold (bank 1) Catalystgeneral failure - performance problem Yes |
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13th March 2024, 10:54
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#4 | |
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Loves to post
Rover 75 Tourer Join Date: Jul 2016
Location: Withernsea
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Quote:
Reset and deleted codes and ran until it errored again with P0141 Checked wiring to lambda sensor , which revelled nothing obvious so renewed rear lambda sensor and reset and erased codes , All being fine since |
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13th March 2024, 14:51
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#5 |
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Discount MG Rover Spares
Rover 75 CDTi, 2x MG ZS180 Join Date: Jun 2011
Location: Hythe, Southampton
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All of the oxygen sensor codes are probably related - to me this looks like the downstream sensor (post-cat) has failed.
This is the sensor you need: https://www.dmgrs.co.uk/products/rov...0722-mhk100728 P0445 is a little more unusual - I'd reset it once you've changed the oxygen sensor and see if it comes back.
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Linear Mode
