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Combined display of all available logs of Fiero Wiki. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

• 20:30, 6 July 2026 Cliff talk contribs created page Manifold absolute pressure sensor (Created page with "'''Manifold absolute pressure sensor''' refers to the manifold-pressure sensor used by the Pontiac Fiero ECM. The manifold absolute pressure sensor tells the ECM how much pressure or vacuum is present in the intake manifold. The ECM uses this information to estimate engine load and to calculate fuel delivery, ignition timing, and drivability behavior. == Overview == The manifold absolute pressure sensor is often abbreviated as MAP sensor. The MAP sensor is on...")
• 20:29, 6 July 2026 Cliff talk contribs created page Manifold air temperature sensor (Created page with "'''Manifold air temperature sensor''' refers to the air-temperature sensor used by the Pontiac Fiero ECM. The manifold air temperature sensor tells the ECM the temperature of the incoming air. The ECM uses this information for fuel-mixture calculations, warm-up behavior, drivability control, and diagnostic trouble code decisions. == Overview == The manifold air temperature sensor is often abbreviated as MAT sensor. Air temperature affects air density. Cooler...")
• 20:29, 6 July 2026 Cliff talk contribs created page Throttle position sensor (Created page with "'''Throttle position sensor''' refers to the throttle-position sensor used by the Pontiac Fiero ECM. The throttle position sensor tells the ECM how far the throttle is opened. The ECM uses this information for fuel control, acceleration enrichment, idle behavior, deceleration behavior, and diagnostic trouble code decisions. == Overview == The throttle position sensor, often abbreviated as TPS, is mounted on the throttle body and is connected to the throttle sh...")
• 20:21, 6 July 2026 Cliff talk contribs created page MediaWiki:Common.css (Created page with "CSS placed here will be applied to all skins: Limit article width on large screens for better readability: .mw-body, #content { max-width: 1200px; margin-left: auto; margin-right: auto; }")
• 20:16, 6 July 2026 Cliff talk contribs created page File:Cliffs Fiero2 Full.jpg
• 20:16, 6 July 2026 Cliff talk contribs uploaded File:Cliffs Fiero2 Full.jpg
• 20:14, 6 July 2026 Cliff talk contribs created page File:Cliffs Fiero2.jpg
• 20:14, 6 July 2026 Cliff talk contribs uploaded File:Cliffs Fiero2.jpg
• 19:19, 6 July 2026 Cliff talk contribs created page Category:Fieropedia templates (Created page with "'''Fieropedia templates''' contains templates used to format, organize, or maintain Fieropedia articles. Category:Fieropedia")
• 19:19, 6 July 2026 Cliff talk contribs created page Category:Pages needing images (Created page with "'''Pages needing images''' contains articles where a photo, diagram, illustration, or other image would improve the page. Articles are added to this category automatically when they use the Image wanted template. Category:Fieropedia")
• 19:19, 6 July 2026 Cliff talk contribs created page Template:Image wanted (Created page with "<div style="border:1px solid #aaa; background:#f8f8f8; padding:0.6em; margin:0.8em 0;"> '''Image wanted:''' {{{1|This article would benefit from an image.}}} </div> <includeonly>Category:Pages needing images</includeonly> <noinclude> This template is used to mark pages where an image, photo, diagram, or illustration would be useful. == Usage == <pre> {{Image wanted|Photo showing the oxygen sensor location on the 2.8L V6 exhaust crossover/Y-pipe area.}} </pre> Pag...")
• 19:10, 6 July 2026 Cliff talk contribs created page Coolant temperature sensor (Created page with "'''Coolant temperature sensor''' refers to the engine coolant temperature sensor used by the Pontiac Fiero ECM. The coolant temperature sensor tells the ECM how warm the engine is. The ECM uses this information for fuel mixture, idle control, cold-start enrichment, warm-up behavior, closed-loop operation, and diagnostic trouble code decisions. == Overview == The coolant temperature sensor is one of the most important engine-management sensors on the Fiero. Wh...")
• 19:08, 6 July 2026 Cliff talk contribs created page Oxygen sensor (Created page with "'''Oxygen sensor''' refers to the exhaust oxygen sensor used by the Pontiac Fiero ECM for fuel-mixture control. The oxygen sensor monitors oxygen content in the exhaust stream. The ECM uses this signal to help determine whether the engine is running rich or lean during closed-loop operation. == Overview == The oxygen sensor is part of the Fiero's electronic fuel injection system. Once the engine is warm enough and operating conditions are correct, the ECM ente...")
• 19:06, 6 July 2026 Cliff talk contribs created page ECM (Created page with "'''ECM''' stands for '''Engine Control Module'''. On the Pontiac Fiero, the ECM is the computer that controls the engine management system. The ECM receives information from engine sensors, processes that information, and controls fuel delivery, ignition timing, idle control, emissions functions, and diagnostic trouble code reporting. == Overview == The Fiero ECM is part of the car's electronic fuel injection and engine-control system. It monitors sensor inputs s...")
• 19:05, 6 July 2026 Cliff talk contribs created page Code 55 (Created page with "'''Code 55''' is a diagnostic trouble code related to the ECM on the Pontiac Fiero. Code 55 indicates that the ECM has detected an internal error or serious ECM-related fault. == Overview == The ECM controls the engine management system. It receives sensor inputs, processes engine operating conditions, and controls fuel delivery, ignition timing, idle control, emissions functions, and diagnostic functions. Code 55 is set when the...")
• 19:04, 6 July 2026 Cliff talk contribs created page Code 53 (Created page with "'''Code 53''' is a diagnostic trouble code related to system voltage on the Pontiac Fiero. Code 53 indicates that the ECM has detected a system over-voltage condition. == Overview == The ECM monitors vehicle electrical system voltage. If voltage becomes too high, the ECM may set Code 53. A system over-voltage condition can be caused by a charging-system problem, alternator problem, voltage regulator problem, wiring problem, poor b...")
• 19:04, 6 July 2026 Cliff talk contribs created page Code 52 (Created page with "'''Code 52''' is a diagnostic trouble code related to the ECM CALPAK on the Pontiac Fiero. Code 52 indicates that the ECM has detected a problem with the CALPAK, CALPAK installation, CALPAK connection, or related ECM backup-calibration function. == Overview == The CALPAK is a calibration package used by the ECM. It provides backup calibration information that allows the ECM to operate in a limited mode if certain ECM or PROM functi...")
• 19:03, 6 July 2026 Cliff talk contribs created page Code 51 (Created page with "'''Code 51''' is a diagnostic trouble code related to the ECM PROM on the Pontiac Fiero. Code 51 indicates that the ECM has detected a problem with the PROM, PROM installation, PROM connection, or related ECM memory function. == Overview == The PROM contains calibration information used by the ECM. This calibration tells the ECM how to control fuel, ignition, idle, emissions equipment, and other engine-management functions for a sp...")
• 19:03, 6 July 2026 Cliff talk contribs created page Code 45 (Created page with "'''Code 45''' is a diagnostic trouble code related to a rich exhaust indication on the Pontiac Fiero. Code 45 indicates that the ECM is seeing an oxygen sensor signal that suggests the engine is running rich. == Overview == The Oxygen sensor monitors oxygen content in the exhaust. The ECM uses this signal to adjust fuel mixture during closed-loop operation. Code 45 is set when the ECM detects a rich exhaust condition for longe...")
• 19:02, 6 July 2026 Cliff talk contribs created page Code 44 (Created page with "'''Code 44''' is a diagnostic trouble code related to a lean exhaust indication on the Pontiac Fiero. Code 44 indicates that the ECM is seeing an oxygen sensor signal that suggests the engine is running lean. == Overview == The Oxygen sensor monitors oxygen content in the exhaust. The ECM uses this signal to adjust fuel mixture during closed-loop operation. Code 44 is set when the ECM detects a lean exhaust condition for longe...")
• 19:01, 6 July 2026 Cliff talk contribs created page Code 42 (Created page with "'''Code 42''' is a diagnostic trouble code related to the electronic spark timing circuit on the Pontiac Fiero. Code 42 indicates that the ECM has detected a problem in the electronic spark timing system. == Overview == The Fiero ignition system uses electronic spark timing control. Under normal operation, the ECM can control ignition timing through the ignition module and related wiring. Code 42 is set when the ECM detects an une...")
• 19:01, 6 July 2026 Cliff talk contribs created page Code 35 (Created page with "'''Code 35''' is a diagnostic trouble code related to idle speed control on the Pontiac Fiero. Code 35 indicates that the ECM cannot maintain the expected idle speed. == Overview == The ECM controls idle speed by adjusting the amount of air bypassing the throttle plate. On Fieros equipped with an idle air control system, this is handled through the Idle air control valve, often abbreviated as IAC. Code 35 is set when the actua...")
• 19:01, 6 July 2026 Cliff talk contribs created page Code 34 (Created page with "'''Code 34''' is a diagnostic trouble code related to the Manifold absolute pressure sensor circuit on the Pontiac Fiero. Code 34 indicates that the ECM has detected a manifold absolute pressure sensor signal that represents unusually high vacuum or low manifold pressure. == Overview == The manifold absolute pressure sensor, often abbreviated as MAP sensor, tells the ECM how much pressure or vacuum is present in the intake mani...")
• 19:00, 6 July 2026 Cliff talk contribs created page Code 33 (Created page with "'''Code 33''' is a diagnostic trouble code related to the Manifold absolute pressure sensor circuit on the Pontiac Fiero. Code 33 indicates that the ECM has detected a manifold absolute pressure sensor signal that represents unusually low vacuum or high manifold pressure. == Overview == The manifold absolute pressure sensor, often abbreviated as MAP sensor, tells the ECM how much pressure or vacuum is present in the intake mani...")
• 18:59, 6 July 2026 Cliff talk contribs created page Code 32 (Created page with "'''Code 32''' is a diagnostic trouble code related to the EGR system on the Pontiac Fiero. Code 32 indicates that the ECM has detected a problem with EGR vacuum control or EGR system operation. == Overview == EGR stands for Exhaust Gas Recirculation. The EGR system allows a controlled amount of exhaust gas to enter the intake under certain operating conditions. This helps reduce combustion temperature and emissions. On the Fie...")
• 18:59, 6 July 2026 Cliff talk contribs created page Code 25 (Created page with "'''Code 25''' is a diagnostic trouble code related to the Manifold air temperature sensor circuit on the Pontiac Fiero. Code 25 indicates that the ECM is seeing a manifold air temperature sensor signal that represents an unusually high air temperature reading. == Overview == The manifold air temperature sensor, often abbreviated as MAT sensor, tells the ECM the temperature of the incoming air. The ECM uses this information for...")
• 18:58, 6 July 2026 Cliff talk contribs created page Code 24 (Created page with "'''Code 24''' is a diagnostic trouble code related to the Vehicle speed sensor circuit on the Pontiac Fiero. Code 24 indicates that the ECM is not receiving the expected vehicle speed signal. == Overview == The vehicle speed sensor, often abbreviated as VSS, provides speed information used by the ECM and speedometer-related circuits. The ECM uses vehicle speed information for functions such as idle control, deceleration behavi...")
• 18:58, 6 July 2026 Cliff talk contribs created page Code 23 (Created page with "'''Code 23''' is a diagnostic trouble code related to the Manifold air temperature sensor circuit on the Pontiac Fiero. Code 23 indicates that the ECM is seeing a manifold air temperature sensor signal that represents an unusually low air temperature reading. == Overview == The manifold air temperature sensor, often abbreviated as MAT sensor, tells the ECM the temperature of the incoming air. The ECM uses this information for...")
• 18:57, 6 July 2026 Cliff talk contribs created page Code 22 (Created page with "'''Code 22''' is a diagnostic trouble code related to the Throttle position sensor circuit on the Pontiac Fiero. Code 22 indicates that the ECM is seeing a throttle position sensor signal voltage that is lower than expected. == Overview == The throttle position sensor, often abbreviated as TPS, tells the ECM how far the throttle is opened. The ECM uses the TPS signal for fuel control, acceleration enrichment, idle control, dec...")
• 18:57, 6 July 2026 Cliff talk contribs created page Code 21 (Created page with "'''Code 21''' is a diagnostic trouble code related to the Throttle position sensor circuit on the Pontiac Fiero. Code 21 indicates that the ECM is seeing a throttle position sensor signal voltage that is higher than expected. == Overview == The throttle position sensor, often abbreviated as TPS, tells the ECM how far the throttle is opened. The ECM uses the TPS signal for fuel control, acceleration enrichment, idle control, de...")
• 18:56, 6 July 2026 Cliff talk contribs created page Code 15 (Created page with "'''Code 15''' is a diagnostic trouble code related to the coolant temperature sensor circuit on the Pontiac Fiero. Code 15 indicates that the ECM is seeing a coolant temperature sensor signal that represents an unusually low coolant temperature. == Overview == The coolant temperature sensor is a thermistor. Its resistance changes with temperature. As coolant temperature rises, sensor resistance decreases. Code 15 is set when the E...")
• 18:56, 6 July 2026 Cliff talk contribs created page Code 14 (Created page with "'''Code 14''' is a diagnostic trouble code related to the coolant temperature sensor circuit on the Pontiac Fiero. Code 14 indicates that the ECM is seeing a coolant temperature sensor signal that represents an unusually high coolant temperature. == Overview == The coolant temperature sensor is a thermistor. Its resistance changes with temperature. As coolant temperature rises, sensor resistance decreases. Code 14 is set when the...")
• 18:52, 6 July 2026 Cliff talk contribs created page Code 13 (Created page with "'''Code 13''' is a diagnostic trouble code related to the oxygen sensor circuit on the Pontiac Fiero. Code 13 indicates that the ECM has detected a problem with the oxygen sensor signal or circuit. == Overview == The oxygen sensor is used by the ECM to monitor exhaust oxygen content and adjust fuel mixture during closed-loop operation. A Code 13 does not automatically mean the oxygen sensor itself is bad. The code may also be caus...")
• 18:47, 6 July 2026 Cliff talk contribs created page File:Code55.gif
• 18:47, 6 July 2026 Cliff talk contribs uploaded File:Code55.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code53.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code53.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code52.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code52.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code51.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code51.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code45.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code45.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code44.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code44.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code42.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code42.gif
• 18:46, 6 July 2026 Cliff talk contribs created page File:Code35.gif
• 18:46, 6 July 2026 Cliff talk contribs uploaded File:Code35.gif
• 18:45, 6 July 2026 Cliff talk contribs created page File:Code34.gif