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Peugeot Expert 2018 1.6. keeps going into limp mode
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carwyno17
New User
Feb 19, 2023, 1:04 PM
Post #1 of 6
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Peugeot Expert 2018 1.6. keeps going into limp mode
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Hi, I have recently acquired a 2018 Peugeot expert on about 90000 miles. Not long after I had it, it started going into "limp mode" here is the fault codes it's bringing up. I am pretty handy with fixing things but cannot diagnose the problem from the codes, can someone help? Car Scanner ELM OBD2 DTC report Selected brand: Peugeot ============1============== P0426 Raw code: 0426 ECU: Engine control unit Status: Confirmed OBDII: Catalytic converter temperature sensor, bank 1 - range/performance problem ============2============== P2033 Raw code: 2033 ECU: Engine control unit Status: Confirmed OBDII: Exhaust gas temperature (EGT) sensor 2, bank 1 - circuit high ============3============== U3FFF(FF) Raw code: FFFFFF ECU: Engine control unit#3[Archive (inactive)] Status: Test failed since last DTC clear ============4============== P2084(00) Raw code: 208400 ECU: Engine control unit#3[Archive (inactive)] Status: Test failed since last DTC clear, Test not completed during this operation cycle OBDII: Exhaust gas temperature (EGT) sensor 2, bank 1 - range/performance problem ============5============== P0426(00) Raw code: 042600 ECU: Engine control unit#3 Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested OBDII: Catalytic converter temperature sensor, bank 1 - range/performance problem ============6============== P2033(00) Raw code: 203300 ECU: Engine control unit#3 Status: Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested OBDII: Exhaust gas temperature (EGT) sensor 2, bank 1 - circuit high ============7============== P0949(78) Raw code: 094978 ECU: Transmission control unit#3 / BSI Status: Test failed, Test failed (current drive cycle), Pending, Test failed since last DTC clear OBDII: Auto shift manual (ASM) transmission - adaptive learning not done ============8============== U1118(87) Raw code: D11887 ECU: Transmission control unit#3 / BSI[Archive (inactive)] Status: Test failed since last DTC clear ============9============== U3FFF(FF) Raw code: FFFFFF ECU: Engine control unit#4[Archive (inactive)] Status: Test failed since last DTC clear ============10============== P2084(00) Raw code: 208400 ECU: Engine control unit#4[Archive (inactive)] Status: Test failed since last DTC clear, Test not completed during this operation cycle OBDII: Exhaust gas temperature (EGT) sensor 2, bank 1 - range/performance problem ============11============== P0426(00) Raw code: 042600 ECU: Engine control unit#4 Status: Pending, Confirmed, Test failed since last DTC clear, Test not completed during this operation cycle, Warning indicator requested OBDII: Catalytic converter temperature sensor, bank 1 - range/performance problem ============12============== P2033(00) Raw code: 203300 ECU: Engine control unit#4 Status: Test failed (current drive cycle), Pending, Confirmed, Test failed since last DTC clear, Warning indicator requested OBDII: Exhaust gas temperature (EGT) sensor 2, bank 1 - circuit high
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Hammer Time
Ultimate Carjunky
/ Moderator

Feb 19, 2023, 1:12 PM
Post #2 of 6
(3627 views)
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Re: Peugeot Expert 2018 1.6. keeps going into limp mode
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We don't have that car here in the US so we don't have any info on the vehicle. You have multiple codes for an exhaust gas temp sensor. Never saw a car with one of those so I can't tell you anything about that sensor. You also have a couple of "U" codes which indicate a problem on the communication line or specific modules that lost communication. Can't tell you much more than that. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator

Feb 19, 2023, 1:42 PM
Post #3 of 6
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Re: Peugeot Expert 2018 1.6. keeps going into limp mode
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Same - not sold here but crude basics to check may be too late?? Is the cooling system behaving and holding temp, full of coolant as radiator if a cap there see it cold only. Does it hold pressure, can feel a long radiator hose cold/cool (off for a while hour or more) and again while warming up in front of you will feel firmer but wear gloves could get too hot. All that with no tools. Last for now erratic like that or all of a sudden what recent work if any was in area to those sensors + wiring to them? Tom
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Hammer Time
Ultimate Carjunky
/ Moderator

Feb 19, 2023, 1:45 PM
Post #4 of 6
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Re: Peugeot Expert 2018 1.6. keeps going into limp mode
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His problem is exhaust temp not coolant temp. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
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Feb 19, 2023, 2:37 PM
Post #5 of 6
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Re: Peugeot Expert 2018 1.6. keeps going into limp mode
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WAG - > if engine runs too hot than exhaust is too hot - right? How much work may have disturbed what it's not new anymore yet not old makes pattern issues back to what has been done to it since new should be known or think so?? Tom
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Sidom
Veteran
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Feb 20, 2023, 11:09 PM
Post #6 of 6
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Re: Peugeot Expert 2018 1.6. keeps going into limp mode
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There is a laundry list of codes. Most converter and O2 codes aren't going to put a car into limp mode, a transmission problem can. The best thing to do here would be to save all the code and freeze frame data. Clear everything out, drive the car until it goes in the loop mode and then pull the code again and see what there is.
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